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.
Museum Island
The contents of the museums were decided on as follows: The Pergamon, with the Greek altar that gives it its name, retained much of its collection and was defined as a museum of ancient architecture. The Neues Museum presented archaeological objects as well as Egyptian and Etruscan sculptures, including the renowned bust of Queen Nefertiti. The Altes Museum, the oldest on the island, displayed Greek and Roman art objects on its first floor and hold exhibitions on its second floor. The Bode Museum's paintings went from Late Byzantine to 1800. And, as now, the Alte Nationalgalerie will cover the 19th century. Once this process is completed, perhaps by 2020, the Gemäldegalerie’s painting collection will be transferred to the Bode, and a new annex, and Museum Island will present all art from the ancient civilizations to 1900. The James Simon Gallery, a $94 million visitors’ center designed by the British architect David Chipperfield, is being built beside the Neues Museum. It will in turn be linked to the Neues, Altes, Pergamon and Bode Museums by an underground passageway decorated with archaeological objects.