St Giles' is the largest medieval church in Wales, a substantial Gothic structure whose ornate 135-foot tower dominates the Wrexham skyline and is counted among the Seven Wonders of Wales. The church dates from the 15th century, though the site has been a place of worship since at least the 12th. The tower's elaborate Perpendicular Gothic decoration — carved niches filled with figures, decorative panelling, and a distinctive crown parapet — makes it unusually rich for a Welsh parish church.
Inside, the ceiling of the nave is decorated with gilded bosses and flying musical angels, and there are two notable eagle lecterns, one Elizabethan and one Victorian. The churchyard holds the grave of Elihu Yale, benefactor of Yale University in the United States, whose family connections to the area are commemorated by a memorial near the east end of the church. The tower can be climbed during summer months, rewarding visitors with views over the city and toward the Berwyn and Clwydian hills.