German architect. He was responsible in Potsdam for the Neues Palais (New Palace, 1763-68), with a main elevation based on Vanbrugh's Castle Howard, Yorkshire; the Chinese Tea House (1755-64); and No. 5, Am Neuen Markt (1753-55), based on Palladio's Palazzo Thiene, Vicenza. He also worked with Johann Boumann (c. 1706-1776) on the building of St Hedwig's Roman Catholic Cathedral, Berlin (1772-73), and designed the exquisite picture-gallery at Sanssouci, Potsdam (1755-63), one of the first in the history of museums erected solely to exhibit paintings. He also designed the Nauener Tor in Berlin. //