Pergamon
Pergamon's other notable structure is the great temple of the Egyptian gods Isis and/or Serapis, known today as the "Red Basilica" (or "Kızıl Avlu" in Turkish), about south of the Acropolis at (39 7' 19" N, 27 11' 1" E). It consists of a main building and two round towers within an enormous "temenos" or sacred area. The temple towers flanking the main building had courtyards with pools used for ablutions at each end, flanked by stoas on three sides. The forecourt of the Temple of Isis/Sarapis is still supported by the Pergamon Bridge, the largest bridge substruction of antiquity.
Hierapolis
Hierapolis was first excavated by the German archaeologist Carl Humann during June and July 1887. His excavation notes were published in his 1889 book "Altertümer von Hierapolis". His excavations were rather general and included a number of drilling holes. He would gain fame for his later discovery of the Pergamon Altar, which was reconstructed in the Pergamon Museum in Berlin.