St Mark’s Church is an Anglican church in the middle of Myddelton Square, the largest square in London’s Clerkenwelldistrict.
The square was laid out by William Chadwell Mylne, and there are 75 houses, by 13 different builders, all constructed in a Georgian style, from 1822 to 1843.
St Mark’s Church was built in 1825–27, and designed by William Chadwell Mylne. It is in a plain Gothic style, was built to accommodate 2000 people and cost about £18,000.
The church is Grade II listed.
This information was based on the Wikipedia page on St Mark’s Church, Clerkenwell.