Their office has been vacant for a while now, since before December I think.
He is still an active architect, just doing smaller projects out of his house rather than an office.
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"But a city can be smothered by too much reverence for its past. The skyline must keep acquiring new peaks, because the day we consider it complete and untouchable is the day the city begins to die." - Justin Davidson - May 2010 Issue of New York