Vienna is a city of monuments. One of the most imposing Ringstrasse buildings is the Parliament House modelled along the lines of a Greek temple. With Ringstrasse celebrating its 150th anniversary this year, starting May 1, a series of exciting events have been planned to mark the occasion - in the museums, palaces, art galleries, opera house, concert halls, Vienna University, parks and green spaces located on the Ringstrasse. Likewise, the Vienna University is a reflection of Italian High Renaissance architecture. Standing tall at 93 metres, The Ring Tower on Schottenring is the headquarters of an insurance company.