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
Ottawa Commercial Historic District Ottawa Commercial Historic District The Ottawa Commercial Historic District is a historic district in downtown Ottawa, Illinois. The district includes 195 buildings and structures, most of them commercial buildings, spread out over 26 city blocks. The oldest buildings in the district, located near the Illinois and Fox rivers, were built in the 1830s. The district expanded northward toward the Illinois & Michigan Canal over time, and the buildings in its northern half date to the mid-to-late 19th and early 20th centuries. The district's buildings include most popular Midwestern architectural styles from the mid-19th century through the mid-20th century; some of