Which firms are celebrating their 50th Anniversary in 2003? With information gathered by Counsel House Research, DI lists them by state:

Where are the architects? And where are the most experienced firms? The profession’s governing and regulatory bodies have historically had some difficulty nailing down how many architects there are, and where they practice. Here’s a look at what the states say:

ALABAMA

DPF Architects, PC, Mobile

Hester & Associates, Inc., Birmingham

CALIFORNIA

Benjamin Porch Urmston, AIA-E, Architects, Rancho Mirage

Cannon Design, Los Angeles (Dworski-Cannon)

HSR Associates, Inc. Architects, Oakland

HTI Inc., Architects, Oakland

Killingworth, Stricker, Lindgren, Wilson & Associates, Inc., Long Beach

LeRoy Andrews Architects, Inc., Ventura

NTD Architects, Glendora

Reibsamen, Nickels & Rex Architects, Los Angeles

The Steinberg Group, San Jose

Walt Disney Imagineering, Glendale

Wertheim, van der Ploeg & Klemeyer, San Francisco

COLORADO

RB+B Architects, Inc., Fort Collins

CONNECTICUT

Thomas C. Babbitt, Architect, Torrington

FLORIDA

Fisher & Simmons Architects, Jacksonville

GEORGIA

John Portman & Associates, Inc., Atlanta

HAWAII

Belt Collins, Honolulu

ILLINOIS

B.T. Kemner Architect, Quincy

IOWA

Savage-Ver Ploeg & Associates, Inc. West Des Moines

KANSAS

Marvin Thomas & Associates, Topeka

KENTUCKY

McCullock Associates Architects, Louisville

MARYLAND

Torti Gallas and Partners CHK, Silver Spring

MASSACHUSETTS

Knight Bagge & Anderson, Inc., Boston

Sasaki Associates, Inc., Watertown

MICHIGAN

BEI Associates, Inc. Detroit

Robert C. Metcalf Architect, Ann Arbor

Tower Pinkster Titus Associates Inc., Kalamazoo

MINNESOTA

Hammel Green And Abrahamson, Inc., Minneapolis

MISSISSIPPI

Fountain & Lamas, Architects Ltd., Biloxi

Guild Hardy Associates Architects, Gulfport

MISSOURI

Linscott-Haylett-Wheat Architects, Kansas City

Ross & Baruzzini, Inc., St. Louis

MONTANA

L’Heureux Page Werner, PC, Great Falls

NEW JERSEY

Southern Associates Architects, Rahway

The Goldstein Partnership, West Orange

NEW YORK

Goldstone & Hinz Architects PC, New York

NORTH CAROLINA

The FWA Group, Charlotte, NC

OKLAHOMA

Coleman-Johnson-Clyma, Inc., Tulsa

OREGON

Ralph Appleman Architect, Lake Oswego

PENNSYLVANIA

GBQC Architects, Philadelphia

HHSDR Architect/Engineers, Sharon

L. Robert Kimball & Associates, Ebensburg

TEXAS

3D/International, Inc. Houston

DeMunbrun Scarnlato Associates, Inc.,San Antonio

Hesson Andrews Sotomayor, San Antonio

Marmon Mok, LLP, San Antonio

Wilson Kullman McCord, Inc., Corpus Christi

UTAH

Burtch W. Beall Jr., FAIA, Architect,Salt Lake City

EFT Architects, Inc., Salt Lake City

VIRGINIA

Leavitt Associates, Ltd., Norfolk

WASHINGTON

Bumgardner. Seattle

Burr Lawrence Rising + Bates Architects, PS, Tacoma

Integrus Architecture, Spokane

Jerry Gropp Architect, Bellevue

Wisbeck, Fraser & Fogle, Architects, Bellevue

WISCONSIN

SDS Architects, Inc., Eau Claire

Source: Counsel House Research