Maslak "Spine Tower" which reaches a structural height of 202 meters; while the tallest skyscraper currently under construction in Maslak (as well as Istanbul and the rest of Turkey) is the Diamond of Istanbul, which comprises three centrally-connected towers, the tallest of which will have 53 floors above ground and will reach a structural height of 270 meters (thus surpassing the current tallest completed skyscraper in Istanbul, the 54-floor, 261 meters tall Istanbul Sapphire in the nearby Levent business district.) The Diamond of Istanbul will also be the first steel skyscraper in Turkey, where (as opposed to the situation in the
East Center City Commercial Historic District (1892), Philadelphia Club, the Old Federal Reserve Bank (1932), U.S. Post Office and Courthouse, Walnut Street Theatre, and Forrest Theater. It also includes a set of 3 1/2-story townhouses designed by Benjamin Henry Latrobe for William Sansom. It was added to the National Register of Historic Places in 1984, and underwent boundary adjustments in 2018. East Center City Commercial Historic District East Center City Commercial Historic District is a national historic district located in the Washington Square neighborhood of Philadelphia, Pennsylvania. It encompasses 287 contributing buildings that includes a mix of large and small commercial buildings, banks, hotels, newspapers, clubs,