2004_08_askcitigroup.jpgGiven the hype over the threat to financial buildings in New York, it felt appropriate to dig up a question sent to us a while back, in which a reader wanted to know what was up with the Citigroup Center's roof.

As many of you are probably aware, the tower (the fifth largest in New York, at 53rd and Lex) has a distinctive slanted roof. More peculiarly, as people in neighboring buildings have observed, the panels on the slanted roof are continuously being removed and replaced. Why is this?

Acording to this thread at WiredNewYork, the panels on top of the Citigroup Center are always being removed and replaced, because the window-washing equipment is kept at the top of the building.

Interestingly, the slanted roof has a purpose beyond adding distinction to the New York skyline; it was originally intended to hold solar panels, but they were never installed.

Some history of the building: from NYC Skyscrapers | stats and facts from Emporis | the ten tallest skyscrapers in Manhattan | and the Citigroup Center as represented in Lego.