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.
Parchment
The word parchment evolved (via the Latin "pergamenum" and the French "parchemin") from the name of the city of Pergamon which was a thriving center of parchment production during the Hellenistic period. The city so dominated the trade that a legend later arose which said that parchment had been invented in Pergamon to replace the use of papyrus which had become monopolized by the rival city of Alexandria. This account, originating in the writings of Pliny the Elder ("Natural History", Book XII, 69–70), is dubious because parchment had been in use in Anatolia and elsewhere long before the rise of Pergamon.