Grosvenor Chapel is an Anglican church in what is now the City of Westminster, in England, built in the 1730s. It inspired many churches in New England. It is situated on South Audley Street in Mayfair.
Wikipedia https://en.wikipedia.org/wiki/Grosvenor_Chapel
Official Website http://www.grosvenorchapel.org.uk/
Coordinates 51°30'32.522" N -0°9'4.352" E