Victorian Trades Hall is the headquarters of the Victorian Trades Hall Council. It is located on the corner of Lygon Street and Victoria Street, just north of the Melbourne central business district, in the suburb of Carlton, Melbourne, Victoria, Australia. It is the world’s oldest trade union building.

In 1856 the Melbourne Trades Hall Committee was formed and received a grant of land from premier John O’Shanassy to build the Melbourne Trades Hall. The original Trades Hall was opened in May 1859, built by workers as an organizing place for the labor movement in Melbourne, and as a medium to educate workers and their families. The workers financed the construction of the building themselves. It was built in the style of the parliament buildings which were just down the road, and over the years has been further developed. The original building was made of timber with galvanized iron roofing.

The Trades Hall is located across the road from the eight-hour day monument which was erected to honor the Victorian workers who won the first 8-hour working day in the world in 1856. It is the birthplace of organizations like the Victorian Labor Party and the Australian Council of Trade Unions. Four flags fly from the roof of the building: the Australian Flag, the Eureka Flag, the Australian Aboriginal flag, and the red flag.

Trades Hall is home to a number of Victorian trade unions, community organizations, and left-wing political parties. Until 2017, it had also served as the headquarters of the National Union of Students. The Hall is primarily used by Victorian labor organizations as a space for organizing and coordinating campaigns. The Hall also hosts occupational health and safety training for workers. The various rooms of the Hall can also be hired out for functions, meetings, or conferences and it is often used for theatrical productions and to display artwork.

In recent times, as well as serving as the headquarters of various trade unions and being the center for political and union activities, the Trades Hall Council has opened the Trades Hall building for many cultural events such as theatre productions, art exhibitions, plays, and concerts including the Melbourne Comedy Festival–concentrating on political and ‘on the edge’ performances.

According to Wikipedia