Located across from the Racławice Panorama, you'll notice some strange brick ruins in the side of the hill. These are the remains of Bastion Ceglarski - part of Wrocław's 16th century defensive fortifications. Designed by Hans Schneider von Lindau, the fort consisted of numerous reinforced masonry vaults for storing cannons and artillery, which can still be seen today; later it included a ravelin and turret. By the early 19th century the bastion had lost any significant military value, and in 1807 it was mostly demolished by Napoleonic soldiers; many of the vaults were filled in and the area was turned into an observation hill along the riverside promenade later named 'Holtei Hill' after the famous German-Silesian Romantic poet, writer and actor Karl von Holtei, whose monument was placed at the top. When Breslau became Wrocław after WWII, that simply wouldn't do, Holtei was removed and the lookout was renamed 'Polish Hill.' Today you can explore some of the preserved ruins facing ul. Purkyniego, or hike to the top for lovely views of Ostrów Tumski on the other side of the Odra River.