At the top of that tower was my personal chamber, where one could barely see the balcony that surrounded my bedroom. The simple stain glass was not visible from here, but I could tell that some of my lights were still on through the windows. In fact, several buildings had their lights on, showing that people  were still working. To the far side, A tower was standing on its own with its lights shining through the windows. That was where the Department of Mysteries was, far away from the rest of the people in case any magical mishaps don’t cause undue death. It definitely wasn’t because I wanted the Death Chamber to be as far away from me as possible. 