The location was previously part of the Market Square area and had been the site of the first permanent market buildings as well as site of Joseph Bloor's Farmer's Arms Inn from 1824 to 1831. The Great Fire of Toronto in 1849 caused the northern portions of this building to be pulled down, leading to the building of the current St. Lawrence Market in 1850 a block south at what was then Palace Street, and today is known as Front Street. The vacated area at the corner of King and Jarvis was in the heart of the growing community. The new Renaissance Revival style building was designed by William Thomas.^[1]

It was here that prominent politicians such as John A. Macdonald and George Brown, Fathers of Confederation, addressed the people of Toronto. It was the main venue for musicians and other performers who came to the city. The lower levels were integrated into the market and were home to stores and businesses. A third storey section of the building was known as St. Patrick Hall, an important meeting place for the Irish Catholic Benevolent Union.

By the 1870s the growing city had a number of larger and more suitable performance venues and the Hall entered a long decline. It continued to serve a number of roles, including several years as the home of the National Ballet. The City of Toronto government fully restored the hall in 1967 to mark the Centennial of Confederation (and rebuilt the east wing which had completely collapsed). That same year it was designated as a National Historic Site.^[2][3] The first two Juno Awards ceremonies were presented here in 1970 and 1971.

A remote detonated explosion, standing in for the groundbreaking of Canada's Wonderland theme park in the York Region town of Maple, took place from the Hall.^[4]

The site is protected under Part IV of the Ontario Heritage Act since 2009. The City of Toronto also notes that the "Front Street right of way at 92 Front Street East is an Archaeologically Sensitive Area".^[5]

William Thomas (c. 1799–26 December 1860) was an architect of both England and Canada. He immigrated to Toronto with his wife and 10 children from Leamington Spa, England due to the economic crisis in 1837. After his emigration to Toronto, his career as a city engineer and architect prospered. One of his well-recognized successful works in architecture after his settlement is St. Lawrence Hall.

Thomas’ work was undoubtedly influenced by 16th-century Italian Renaissance architecture, the central Roman temple that consists of the pediment, four engaged Corinthian columns, and the three arches underneath very closely resemble the work of an Italian Classist architect, Andrea Palladio. The symmetrical composition of building elements is also a defining characteristic of Renaissance architecture. The Renaissance Revival was a clear goal of William Thomas, but the Hall reinterpreted the Italination in a vernacular and contemporary manner. St. Lawrence Hall is designed in a Victorian composition with a French mansard roof due to abundant snowfall in Ontario. The ornamental cupola on top of the main hall is another feature of the Hall.

• List of oldest buildings and structures in Toronto

• Emporis Listing
• Parks Canada – Information on St. Lawrence Hall as part of Toronto National Historic Sites Urban Walks