Centrally located in Vienna's Spittelberg quarter, the Altstadt offers 42 unique rooms and suites in a renovated Patrician house. Colors and themes vary from one accommodation to the next, with bold reds and yellows in some, and shades of grey and black in others. Likewise, fabric patterns and furniture styles might range from traditional to cutting-edge contemporary. Founder Otto Weisenthal's extensive contemporary art is as diverse as each of his hotel's rooms, with pieces from his personal collection on display throughout the building. Afternoon tea in the Red Salon is a popular item on many visitors' to-do lists.