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.
Alfred Messel
Messel had long been interesting in the design plan for the Museum Island and since 1907 had been developing plans for the Pergamon Museum. It remains to this day the monumental, austere three-wing neoclassical construction which he conceived but did not live to see realized as he died in 1909. It was constructed with slight modifications between 1910 and 1930 under the supervision of Messel’s close friend, the architect and city planning official Ludwig Hoffmann. The museum was badly damaged in World War II, and starting in 2010 modifications of the building will be undertaken as part of the master plan for Berlin’s Museum Island.