and was an extension of the Trinity Hospital of Milwaukee, which had a capacity of 106 patients needing more intensive treatment. The annex served both as an eye, ear, nose and throat clinic and as a nurses' training hospital providing rehabilitative care to convalescing patients who were transferred from the main Trinity hospital. After the structure was no longer used as a hospital annex, it was repurposed in 1953 as Marquette's Alumni and Athletic Office. Demolition The William Plankinton Mansion was demolished in 1969 to make way for new university facilities constructed in the 1970s. In 1975, the John Plankinton Mansion located next door to the site of the William Plankinton Mansion was likewise demolished. Finally, the Elizabeth Plankinton House was demolished in 1980 and removed under much protest, leading to the formation of the City of Milwaukee Historic Preservation Commission in 1981, with the aim of protecting Milwaukee's architectural heritage. References Sources Houses in Milwaukee Marquette University Buildings and structures demolished in 1969 Houses completed in 1876