With the start of the twentieth century, architectural styles had changed little in Dublin - the dominant style was still a form of classicism based on Gandon's Custom House. It was not until the destruction of parts of the city in the 1916 rising and the formation of the Irish state that new styles were introduced. Dramatic change came swiftly with the stripped down classicism of the Department of Commerce in the early 1930's giving way to the stark modernism of Dublin Airport by the end of the decade. The most important structure of the twentieth century was to be built intermediately after the end of the war in 1945 - Busáras. This important International Modern building was to influence architects in Ireland for the next twenty years. During the 1960s and 1970s the dominant practice in Irish architecture was Scott Tallon Walker who advocated a Miesian approach to architecture as seen with their Bank of Ireland headquarters. In the 1990s with the redevelopment of the historic Temple Bar area, many innovative buildings were constructed with state help by young and rising architects.