The Church of Saint Mark in located in Crown Heights Brooklyn. The Church was constructed in 1915 and the original stained glass sanctuary windows was set in terra cotta tracery.

While employed at CTA Architects, Partner Matthew Jenkins, worked on the restoration of the stained glass window. The project consisted of removing the failing terra cotta tracery and historic stained glass. All of the original leaded stained glass was documented, cleaned and re-leaded. New cast stone tracery was made to match the original terra cotta.