Holy Trinity Heritage Centre is located in a medieval church, restored in 1804. It is now leased by the Church of Ireland Community and is operated as a visitor's centre. The Holy Trinity Centre houses exhibits through video presentations detailing the development of the town from its Norman origins.
The foundations likely date back to the 13th century. A three storey crenellated 15th or 16th century belfry tower is attached to the church building. Inter-denominational burials are permitted in the surrounding graveyard; the earliest inscribed gravestone is dated 1703.