 Complete the following phrase:  The building was, however, not very popular with the public. On the one hand, it did not seem as grand as the Heinrichshof, a private residence which was destroyed in World War II and replaced in 1955 by the Opernringhof. Moreover, because the level of Ringstraße was raised by a metre in front of the opera house after its construction had begun, the latter was likened to a sunken treasure chest and, in analogy to the military disaster of 1866 the 