There's a person called the "Architect of" this structure; he also maintains the Library of Congress building
These agencies are the Architect of the Capitol, the United 
States Botanic ... for the structural care of the Library of Congress and the 
Supreme Court Building in... [DOC] [TLE] Roofing | Thomas Jefferson's Monticello [PAR] There he met Maria Cosway, and from the friendship that ensued came the ... 
Jefferson's hope of seeing a similar roof structure used over a market at ... His 
solution was to take off the shingles and fix what he called serrated lath on top of 
... the architect of the college buildings, but the chairman of the board of visitors 
as well.