[Cosanti]
Paolo and Colly Soleri purchase the land that became the Cosanti Foundation complex. Construction of Soleri's experimental Earth House, originally designed as his residence, although he never occupied.

[Cosanti]
Continued construction of Earth House

[Cosanti]
Banks Upshaw, Soleri's first apprentice, completed the kitchen and bathrooms in the Earth House and later occupied the house with his wife in 1960. Soleri started an enclosed Design Studio and outdoor Ceramics Studio with a Bell Assembly area.

[Cosanti]
First Soleri workshop with Drafting Room/Office and Ceramics Studio completed at Cosanti.

[Cosanti]
North Studio construction begun. As a mostly underground structure, open only to the south, the building features a large skylight in the middle. Initially designed as architectural studio, but later used as model making studio. It is currently used as a gallery space.

[Cosanti]
Silt Pile number 1: models silt-cast; North Studio completed; extensive landscaping. The late Ivan Pintar assisted Soleri and managed Cosanti activities. He lived in the Earth House until his untimely death in 1994.

[Cosanti]
Silt Pile number 2: continued work on silt-cast models. Silt Pile number 3: building begun on new earth-cast structures.

[Cosanti]
Silt Pile number 4: two earth-cast structures to enlarge the studio facilities (Metal Studio) built; North Apse, the first Apse (a quarter spherical standing shell) that welcomes the Cosanti visitors, begun.

[Cosanti]
Silt Pile number 5: construction of Cast Cast House; a second apse 30 feet in diameter (the South Apse) and the adjoining Tunnel begun.

[Cosanti]
Silt Pile number 6: a large 39 ton Canopy constructed together with a Swimming Pool and further work on the Cat Cast House.

[Cosanti]
Silt Pile number 7: expansion of the Metal Studio with the Foundry Apse; construction of the first section of the Pumpkin Apse (also known as JacobÃs Studio); construction of a new drafting room (Barrel Vault), landscaping and Cat Cast House completion.

[Cosanti]
Silt Pile number 8: completion of the cat-cast Swimming Pool and Canopy; construction of another Barrel Vault and construction of the Student Apse, with embankments and landscaping begun.

[Cosanti]
Silt Pile number 9: construction of last Barrel Vault (Drafting Room.)
[Arcosanti]
Purchase and lease of land for the prototype arcology by the Cosanti Foundation at Cordes Junction near Mayer, Arizona. Preliminary design of a prototype arcology, Field trips to the Site on the mesa.

[Arcosanti]
Continued work on preliminary Arcosanti designs; began production of working drawings of peripheral structures (Foundry Apse, Ceramics Apse and South Vault) on the mesa building site. At the Construction Camp near the Agua Fria River, temporary living areas are set up consisting of kitchen and sanitation facilities; construction of Camp concrete casting plant for precasting components of eight-foot cubes used as cells for living quarters.

[Arcosanti]
Continued work on Camp site with office and drafting room built; construction of the Octagon, an all-purpose space for group activities; Wood Shop built. On the mesa, aerial survey; water to the site; Ceramics Apse and South Vault footings.

[Arcosanti]
South Vault erected by June 21, major portion of the heavy construction Ceramics Apse completed; electricity brought to the Site. Foundry Apse excavation begun, with footings cast and walls precast; East Housing begun; Crafts III ("The Restaurant") begun with hand excavation, pouring of footings and rock retaining walls.

[Arcosanti]
East Housing heavy construction and interior completed; West Housing begun; more footings of Crafts III poured and floor panels set; "waffle slab" of second floor set; most of he first three (of the four) floors precast of the south half (Phase 1) completed; Ceramics Apse work finished; a major portion of the heavy construction of the Foundry Apse completed (including precast arch erection and poured-in-place silt-cast shell.)

[Arcosanti]
Second Vault (North Vault) begun, to provide additional sheltered work space. Retaining walls poured in front of Ceramics Apse for the Amphitheater which faces the apse. Most exterior work completed on the Ceramics Apse. Continued work on Crafts III: two-story foyer and circle panels erected; completion of phase one of Crafts III--the first three floors of the south half of the building; phase two (the north half) of Crafts III begun; at completion, Crafts III contains apartments, public dining room (the Cafe), rock garden with refreshment facilities and exhibition space. Swimming Pool excavation and construction begun. West Housing heavy construction and interior completed; lower work area of Foundry Apse constructed and furnace wells and floor slabs added; landscaping undertaken; new access roads cut. Surveys and initial work on Pierre Teilhard de Chardin Cloister, a conference center with residences, performance and exhibition spaces. Arcosanti selected by the State of Arizona for a Bicentennial site in the Horizons '76 program.
[Cosanti]
Antioch building was built by students from Antioch College in Ohio participating in special workshop program at Cosanti, using earthcasting technique for curved ceiling designs.

[Arcosanti]
North Vault in process of being erected. First occupation of Crafts III. Pierre Teilhard de Chardin Cloister foundations dug and other construction preparations made. "Arcosanti Events," a program of various types of entertainment in the Ceramics Apse, initiated. Haystack School of Crafts four-week workshop conducted at Arcosanti; two kilns built.

[Arcosanti]
Completion of North Vault; construction of the Lab Building; Redesign of Arcosanti to apply the Two Suns Arcology concept. Festival at Arcosanti. Completion of Antioch Building at Cosanti. Haystack School of Crafts four-week workshops repeated at Arcosanti, leaving a fireplace corner in the Valetta canyon and weaving looms.

[Arcosanti]
Further work on the Swimming Pool, Skylight topped the Crafts III building, Winter Woodworking workshops. East Crescent drawings begun. "Health and Healing" Festival and Conference at Arcosanti in October.

[Arcosanti]
Camp Greenhouse prototype; completion of Arcosanti Swimming Pool; Cosanti Gallery opened; Arcosanti Gallery opened on the second floor of Crafts III; preliminary design of Arcosanti Critical Mass Plan. Festival and Conference "Art and the Environment," in October, the largest at Arcosanti ever.

[Arcosanti]
East Crescent continued, lower levels of S.O.D. Unit constructed.

[Arcosanti]
East Crescent, S.O.D. Unit, and Music Center continued. First level of the S.O.D. Unit completed as a drafting room. Arcosanti Festival and Conference, "Teilhard and Metamorphosis."

[Arcosanti]
East Crescent continued, beginning work on interiors of the S.O.D. Unit. Bakery at Arcosanti opened. Cafe moved to the second floor. Colly Soleri Music Center established.

[Arcosanti]
East Crescent continued. Peach Orchard planted with funds from ATEC: Greening the Earth. Festival "Food Chain, Food, Famine, and Metamorphosis."

[Arcosanti]
Excavation and beginning of Greenhouse Guest Rooms.

[Arcosanti]
Construction of first Greenhouse housing unit below Swimming Pool, Sky Suite completed, Space For Peace Gallery opened in the South Vault, Camp landscaped and part of Plywood City dismantled, two new wells drilled, fish pond and Boschetto established.

[Arcosanti]
East Crescent First Unit interior work. The first Arcosanti Reunion on July 4th weekend.

[Arcosanti]
Completion of the East Crescent First Unit. Second level of the S.O.D. Unit completed as the Office and new Drafting Room. Nature And Art Biennale, an event with artists creating works on Site.

[Arcosanti]
Construction continues on tiered seating areas of the East Crescent Amphitheater.

[Arcosanti]
East Crescent Amphitheater completed, including the installation of the canopy. Arcomart established. In May, the "Minds for History" program was initiated with the first conference held in the new East Crescent Amphitheater. Second "Minds for History" conference held in October.

[Arcosanti]
Renovation, maintenance, railings, landscaping and paved walkways. Renovation of the Camp courtyard, Camp bathrooms and some of the cubes. Third "Minds for History" conference held in October in East Crescent Amphitheater. "Arcosanti Events," including concerts, Pictograph 2000 lightshow performances, and the Twentieth Anniversary Arcosanti Reunion.

[Arcosanti]
Renovation of the original Camp kitchen into a 10 room Bunkhouse (Plywood City). Start of a complete overhaul of the Camp electrical system. Installation of a Fire Suppression System in the Foundry, and Water Access line for a fire engine from the Pool to the La Loggia level; first pre-cast panels for initial section of Energy Apron, below the Swimming Pool. July 4th Alumni Reunion. Fourth "Minds for History" conference, a one-day event featuring Paolo Soleri, held in October.

[Arcosanti]
Continued concrete work on East Crescent second and third units (East Crescent phase II). Silt Carving Workshops, a one-week program for adults and one-day program for kids, offered. Fifth "Minds for History" conference, with Stephen J. Gould featured.

[Arcosanti]
Continued concrete work and interior finishing on East Crescent phase II. Excavation begun for East Crescent units 4 & 5 (phase III); footings & slabs poured for phase III Heat Duct Tunnel. Major exhibition installation material production: SOLERI'S CITIES, Architecture for the Planet Earth and Beyond, produced at Arcosanti and held at the Scottsdale Center for the Arts in Arizona.

[Arcosanti]
Continued interior finishing on East Crescent phase II; 7 of 12 living units are completed and occupied. Continued excavation and Concrete work in phase III; Heat Duct Tunnel and footings are completed. Planning undertaken for the rest of the East Crescent. Arcomedia program initiated. Model: Asteromo '94, commissioned and executed for the Mei Center for the Arts in Japan.

[Cosanti]
Gallery building at Cosanti burns; restoration undertaken.
[Arcosanti]
Interior finishing on East Crescent phase II is virtually complete. Continued concrete work on phase III; first floor completed, second floor begun. Rock stairs built at the Greenhouse Guest Rooms. Rock walls between the Foundry and Crafts III rebuilt and reinforced. Extensive blasting for the Heat Duct Tunnel trench for the rest of the East Crescent. Arcosanti On-line established. Rennovation of the Octogon in Camp. Preliminary designs for Critical Mass II. Week-long alumni reunion.

[Cosanti]
Cosanti Gallery restoration complete.
[Arcosanti]
Continued interior finishing on East Crescent phase II; two more apartments are completed and occupied. Structural concrete work completed on East Crescent phase III; steel framing begun. Continued blasting and excavation for the East Crescent Heat Duct Tunnel. A new section of the tunnel, beneath the planned keystone unit, is built. Extensive landscaping around the Greenhouse Guest Rooms. Hyper Building exhibit materials produced for a symposium in Tokyo.

[Arcosanti]
East Crescent Phase III Interior Drywalls and exterior Rock wall. Phase IV Keystone Heat Duct Tunnel. Lightscoop and Heat Duct Tunnel footings, walls and slabs. Phase V Stair Precast Panels. Tensile Structure Workshop with FTL(New York). East Crescent Phase III Intrerior. Phase IV Finger, Divider and Front P-opening precast panels with footings and bracings.

[Arcosanti]
Continued interior work on EC Phase III units 4 and 5. Completed curved pre-cast panels for Phase V stairs. The final façade panels for the East Crescent Theater were precast and raised. Renovation of Vineyard and Peach orchard in Camp. New wood fired hot tub built in camp. Minds Garden campground built. Expansion and renovation of visitors’ trail. Held Permaculture certification course in conjunction with IIEA.

[Arcosanti]
East Crescent Phase III Interiors. Phase V Party wall Footings. Y2K preparedness (Water tank pad, Water tank plumbing, Backup generator hookups, etc.) Teilhard de Chardin Complex Presentation at the Paradox II Conference.

[Arcosanti]
East Crescent Phase III - Interior work, Furniture and Finishes. Installation of Hydronic Heating and Fire Suppression and Propane Gas System.
East Crescent Phase V [consists of 5 Units] - Concrete Construction of Floor Ducts; Footings, 1st Floor Slabs cast over cinderblocks acting as air ducts carrying warm air from the heatduct. , Central Staircases.
General Sidewalk widening and repair. New Pump-house and new Water Tank.

[Arcosanti]
Work on the East Crescent Phases I, II, and III completed five units of the west half (Units 1-5) of this building. With the onset of Phase V of this project the final 5 units (6-10) were begun at the same time. The first floor slabs and walls were completed, along with many of the beams supporting the 2nd floor slab. The Arcosanti 5000 design (population 5000) was introduced at the Paradox III conference

[Arcosanti]
East Crescent Phase V Concrete 2nd Floor slab, Introduction of insulated concrete form system used in the 2nd floor walls and 3rd floor slab, assisted by an Italian crew. Metal railings extended throughout the site.
[Cosanti]
Catcast Renovation and Heating System.

[Arcosanti]
East Crescent Phase V -  Public Bathroom Facilities with ADA accessible on the 1st Floor of Unit 8, Interior Plaster on 1st Floor, Installation of Solar Photovoltaic Electric System, Welding and Installation of custom-built Railings. Silt-cast construction of four large Light-scoop Panels. Final Concrete Casting of Insulated Formwork.

[Arcosanti]
East Crescent Phase V – Installation of Doors and Windows, Interior Plaster on the 2nd Floor, Installation of Glass-block Shower-stall in Unit 6, Concrete Staircase from 1st to 2nd Floor of Unit 10, Installation of Metal Studs and Gypcrete Hydronic Heating and Plumbing Rough-in.
Foundry: Construction of a large Extension of Work-space below the Foundry. Ramp and Loading Dock at East Side of Foundry connecting to the Silt Cast Area.

[Arcosanti]
East Crescent Phase V – 2nd Floor Interior Walls & Showers, Electrical Mechanical Room and Installation of Electrical Distribution System. Installation of Water Distribution and Fire Suppression System. Rennovation of Music Center Greenroom bathroom.
[Cosanti]
Cosanti Originals' Work and Storage structure was added in the craft assembly patio, echoing the curved Antioch building shape constructed with the same earthcasting technique in 1974.

[Arcosanti]
East Crescent Phase V – 2nd Floor Bathroom Interiors, Floor and Wall Tile, Light-scoop Apartment Cabinets and Wood Trim, Paint, Concrete Counter-tops.
East Crescent Phase III – 3rd Floor Apartment Finishing of Floor, Walls and Installation of complete Kitchen. Ceramics studio storage unit.