If you are a visitor to St. Louis and not a professional architect, these links may interest you:
City of St. Louis
Gateway Arch
St. Louis County Government
St. Louis Convention & Visitors Center
Missouri General Assembly
Forest Park Forever
City Museum
Landmarks Association of St. Louis
Tower Grove Park
Missouri Botanical Garden
Vote Smart
If you are a professional architect and visiting St. Louis, these links might interest you:
The American Institute of Architects (AIA)
AIA Missouri
Missouri Board of Architects, Professional Engineers, Architects, et al
National Council of Architectural Registration Board
AIA Trust
Industry
Association of General Contractors
U.S. Green Building Council
Architecture
Built St. Louis
Gateway Arch
Pulitzer Foundation
Young Architects Forum
Schools of Architecture
Washington University Sam Fox School of Design & Visual Arts
Drury College
Kansas University
Kansas State University
Saint Louis Community College Architectural Technology
Ranken Technical College Architectural Technology