The Old Town Hall is a municipal structure in Castle Street, Lisburn, County Antrim, Northern Ireland.

Wallace had inherited the unentailed tenancies from his father, Richard Seymour-Conway, 4th Marquess of Hertford, and had significantly expanded the estate.

[2] The site Wallace selected had formerly been occupied by a French Huguenot church which had been completed in the early 18th century.

[3] The building was designed in the neoclassical style, built in red brick with stone finishings and was completed in 1884.

[4] The office became redundant after the tenants exercised their rights to buy under the Irish Lands Acts and the estate was broken up in the late 19th century.