HANSEN, CHRISTIAN FREDERIK (17 56-1845) Danish architect, was born at Copenhagen on Feb. 29, 1756. In 1804 he was appointed professor at the Academy, and head of the department of architecture. He was responsible for the rebuild ing of the king's palace at Christiansborg, which had been burnt down in 1794, and he also designed the Frauenkirche in Copen hagen. He died on July Io,