The exterior of the Tehran Bar Association represents the idea of 'justice' through an abstraction of the form of a giant balance (defined by brass and copper cladding). The interior strives for maximum transparency -- even for a 'sense of floating' -- with offices organised in two vertical volumes divided by a light shaft that widens as it proceeds upwards.
Source: Aga Khan Trust for Culture
See also:
"Tehran Bar Association." Official Website of the Naqsh,e,Jahan Pars Consulting Engineers.
http://www.njp-arch.com/projects/p_c/C_23.htm. [Accessed January 17, 2007]