 Complete the following phrase:  Chyasilin Mandap was built in the eighteenth century, but completely destroyed during the 1934 earthquake. Architects Götz Hagmüller and Niels Gutschow rebuilt it, using old paintings and early twentieth century photographs as a reference. With the help of locals who had survived the 1934 earthquake, they managed to locate eight of the original pillars and some other fragments of the old building. Dr. Walther Mann, an expert on earthquake proof architecture, created an internal framework of steel and concrete. Craftsmen from Bhaktapur and Patan recreated all te other parts. The work was completed in 1990. Thanks to the controversial choice to use contemporary technology to strengthen the structure, Chyasilin Mandap survived the 