Complex sentence: The Shaheed-Smarak or Martyr's Memorial, is a historic and monumental circular building, in what was known pre- 1947 as Gole-Bazar or the Wright Town.
Split into simpler sentences: The Shaheed-Smarak or Martyr's Memorial, is a historic and monumental circular building. It's located in an area, that was known pre- 1947, as Gole-Bazar or the Wright Town.