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.
Library of Pergamum
Manuscripts were written on parchment, rolled, and then stored on the shelves. In fact, the word "parchment" itself is derived from Pergamum (via the Latin "pergamenum" and the French "parchemin"). Pergamum was a thriving center of parchment production during the Hellenistic period. The city so dominated the trade that a legend later arose indicating that parchment had been invented in Pergamon to replace the use of papyrus, which had become monopolized by the rival city of Alexandria. This however is a myth; parchment had been in use in Anatolia and elsewhere long before the rise of Pergamon. Parchment reduced the Roman Empire’s dependency on Egyptian papyrus and allowed for the increased dissemination of knowledge throughout Europe and Asia.