Complex sentence: As a result of the bombing, relatively little of the pre- 1945 City remains, although many historic villas built by wealthy German vacationers from the Ruhrgebiet during the heyday of Bad Kleve still stand along the B9 near the Tiergarten.
Split into simpler sentences: As a result of the bombing, relatively little of the pre- 1945 City remains. Those structures spared include a number of historic villas built during the heyday of Spa Bad Kleves, and they are located along the B9 near the Tiergarten.