citizenship by the Swiss municipality of Affoltern am Albis in return for the planning and construction of their main church's bell-tower. This citizenship was later confirmed by the Zurich cantonal government in December 1861 and with these new Swiss passports in hand, Semper was once again able to travel and finally also visit Germany, after the warrant for his arrest had been cancelled in Mai 1863. Semper provided Bavaria's King Ludwig II with a conceptual design for a theatre dedicated to the work of Richard Wagner to be built in Munich. The project, developed from 1864 to 1866, was never realized, although Wagner 'borrowed' many of its features for his own later theatre at Bayreuth. Later life (from 1871) Already in 1833, there were first plans in Vienna for the public presentation of the Imperial Art Collections. With the planning of the Vienna Ring Road, the museum question became pressing again. Works forming the imperial art collection were scattered among several buildings. Semper was assigned to submit a proposal for locating new buildings in conjunction with redevelopment of the Ring Road. In 1869, he designed a gigantic 'Imperial Forum' which was not realized. The National Museum of Art History and the National Museum of Natural History were erected, however, opposite the Palace according to his plan, as was the Burgtheater. In 1871, Semper moved to Vienna to undertake the projects. During construction, repeated disagreements with his appointed associate architect (Karl Freiherr von Hasenauer), led Semper to resign from the project in 1876. In the following year, his health began to deteriorate. He died two years later while on a visit to Italy and is buried in the Protestant Cemetery, Rome. Legacy Semperdepot, Lehargasse, Vienna Works (selected) Dresden Hoftheater – 1838-1841 (destroyed by fire in 1869) Villa Rosa – 1839 (destroyed in the Second World War) Semper Synagogue – 1839-1840 (destroyed on November 9, 1938 - Kristallnacht) Oppenheim-Palace – 1845-1848 Semper Gallery (Dresden Gemäldegalerie)– 1847-1855 Neues Hoftheater (Semperoper) – 1871-1878 Zürich City Hall – 1858 (only concept for competition; not built) Polytechnical School, (ETH Zurich) – 1858-1864 Observatory - 1861-1864 Winterthur City Hall – 1865-1869 Vienna Municipal Theater (Burgtheater) – 1873 - 1888 Museum of Art History (Kunsthistorisches Museum) (1872–1881, finished 1889) Natural History Museum (Naturhistorisches Museum) (1872–1881, finished 1891) See also Dresden school Architectural theory Notes References Berry, J. Duncan. The Legacy of Gottfried Semper. Studies in Späthistorismus (Ph. D.