Trinity Episcopal Church was constructed between 1863 and 1865 following a design by prolific Janesville architect Garry Nettleton (who would later design Platteville’s National Register listed First Congregational Church). Though modest in size, Trinity Episcopal Church is a fine example of the Gothic Revival style that had become popular in Wisconsin between about 1850 and 1880. The building displays a number of defining features of the style including pointed arches in windows and doorways; a steeply-pitched gable roof with decorative brickwork along the cornice; stone-capped, stepped brick buttresses along exterior walls; a dominant front tower with pointed-arch belfry openings; and a highly ornate interior with decoratively carved wood detailing and a pointed-arch arcade between the sanctuary and chancel. With no substantial alterations to its original Gothic Revival design in more than 150 years of continuous use by Platteville’s Trinity Episcopal congregation, the building is also notable as Platteville’s best-preserved mid-nineteenth-century church.