Other halls of residence include two buildings on the Garthdee Campus; the Square Tower and the Round Tower. These distinctive pink buildings were constructed in the early 1990s and inspired by traditional Scottish tower houses. They have received architectural acclaim by critics and are included in "Prospect" magazine's list of the 100 best Scottish modern buildings. When the list was published in 2005, the Round and Square Towers were the only buildings in Aberdeen to be included. A number of other halls of residence across the city are used, some operated in-house by RGU and others by private companies. These include Rosemount Halls, St. Peter's Halls and Linksfield Halls which were constructed by the University of Aberdeen and then privatised in the early 2000s. Students also have access to the private halls of residence in Aberdeen which are operated on a commercial basis by specialist companies, such as those owned and operated by the Unite Group.