Mass Architects, Inc.

12/10/2025

It is with great sadness that we share the news of the passing of longtime AIA member, Duane Mass.

Duane Denver Mass, 68, of Oklahoma City and Tulsa, died in Oklahoma City on Sunday, December 7, 2025.

He was born in Coffeyville, Kansas in 1957 to Frank and Laura Imogene Mass, and was raised on a family ranch in Hartshorne, Oklahoma. Duane worked as a carpenter before attending Oklahoma State University to study architecture. He founded Mass Architects, Inc. in 1995, focusing his work on building community-oriented projects for Oklahoma’s county health departments, multiple Oklahoma school districts, airports, Catholic Charities of the Archdiocese of Oklahoma City, The Education and Employment Ministry, and by working as the Capitol Architect for the renovation of the Oklahoma State Capitol building.

Duane was preceded in death by his parents Frank and Laura Imogene Mass, and is survived by his wife Robin; his children Frank Mass and wife Lauren and their daughter Vivian, Jessica Douglas and husband Collin, and Rachel Mass. He is also survived by his daughter Natalie and his siblings Mickey Switzer, Roger Mass, Lannette Huskey, Susan Evans, and Frankie Mass.

Services will be held at Christ the King Catholic Church in Oklahoma City at 10:30am on Monday December 15th, and burial and additional service will be held at 10:30am at Holy Rosary Catholic Church in Hartshorne on Wednesday December 17th.

Contributions may be made to the Glioblastoma Foundation at glioblastomafoundation.org in Duane’s honor.

11/29/2021

10/20/2021

09/02/2021

DYK: Most visitors to the Oklahoma Capitol Building don't know this part of the restoration project: The attics!

Above each of the north, south, east and west wings, large attics house necessary electrical, mechanical and fire sprinkler systems to service the building, primarily the Senate and House of Representatives chambers.

In the 100 years after original construction, these attic spaces became filled with unused and abandoned systems. As part of the restoration project, Manhattan Construction Group has demolished much of the old, unused materials and performed extensive cleanup.

Manhattan will also install new fall-protection systems (shown in yellow) to provide a 100% safe work environment for those needing to perform maintenance in the attic.

05/26/2021

04/02/2021

Speaker Geoff Parker Architect, Mass Architects Geoff Parker is the Director of Architecture at Mass Architects in Oklahoma City. Geoff is a lifelong Oklahoman, artist and a licensed architect with over 25 years of office experience. During this time he has designed and worked on a wide range of pro...

03/26/2021

Join us for Sketching at Scissortail Park on May 25th!

https://events.r20.constantcontact.com/register/eventReg?oeidk=a07ehrj0a75125c6418&oseq=&c=&ch=

03/26/2021

Very excited for the Chisholm Creek team to receive this award, and we are honored to have had a role in the project!

Thursday, March 25, 202111:30 am | honorees arrive at Cowboy & Western Heritage Museum11:45 am | livestream starts for online guests

03/24/2021

More progress updates on the State Capitol restoration. I guess you can say the deal is sealed?

Workers from installed a brand new, 3,000-pound state seal in the Oklahoma state Capitol on Monday as the building continues to undergo renovations.

03/22/2021

03/02/2021

Check out the work of Mass Architect Geoff Parker at Oklahoma Landmarks Friday, March 5-Tuesday, March 30, at the Paseo Plunge!