The Church of the Holy Trinity was completed in 1859 and designed by architect John Notman. A corner tower was added in 1868 and was designed by Fraser, Furness and Hewitt. The Church is primarily constructed of sandstone masonry in the neo-Romanesque style, keeping with the intent to be a simple, “low church” parish. The Parish House, constructed at the same time as the Church, is constructed of brick masonry and faced with sandstone. The Church is known for its numerous stained-glass windows including five by Louis Comfort Tiffany and one by Luc-Olivier Merson. It was placed on the Philadelphia Register of Historic Places in 1957 and the National Register of Historic Places in 1973.\
 
K&H was initially retained by the Church to perform a City Façade Ordinance Inspection, which identified that patch material applied to the sandstone façade in the 1950s was failing, creating potentially hazardous conditions. Ownership tasked K&H with conducting a Condition Assessment of the façade to plan for upcoming repair and/or replacement programs. K&H coordinated with a contractor to remove materials deemed at risk of detaching from the façade. The assessment identified the problematic nature of the cementitious patch material and the condition of the original sandstone, as well as deterioration of the wood windows throughout the Church. A testing and repair program was developed that included options for patch removal and sandstone repair.
 
K&H was entrusted by Ownership and management to provide architectural engineering services for the façade condition assessment, including a hands-on visual survey via high reach and scaffolding, diagnostic analysis of cementitious patching and original sandstone deterioration, and development of a testing and repair program and engineering opinion of cost. K&H coordinated with contractors to safely access the façades on Rittenhouse Square with a high volume of pedestrian and vehicular traffic. A repair program was designed in phases to accommodate the Church’s budget and operation as an active congregation.