NEW YORK CITY-At roughly 5:20 p.m. yesterday, Seven World Trade Center fell to the ground. The two-million-sf office building housed Mayor Rudy Giuliani’s remote command center, which has now been moved to makeshift meeting rooms at an undisclosed location.

The structure was owned by developer Larry Silverstein’s private company and built on land owned by the Port Authority. Seven World Trade Center was Silverstein’s first deal with the PA, a relationship which peaked when Silverstein Properties Inc. net leased four additional World Trade Center buildings including the now-decimated towers in a historic $3.2-billion transaction four months ago.

Seven World Trade Center was compromised earlier in the day when One World Trade Center, the second tower to collapse, leaned against the building prior to imploding. The smaller building’s structural integrity was severely compromised and fires that sprang up as a result of the impact burned throughout the day. Firefighters were unable to get near the structure, which tilted slowly to the south for the next eight hours before collapsing into rubble yesterday afternoon. Another smaller building, located on West Street, was similarly damaged and is expected to topple as well.