John P. Gaynor

John P. Gaynor (circa 1826–1888) was an Irish American architect practicing in New York City and San Francisco during the nineteenth century.

John Plant Gaynor was born circa 1826 in Dublin, Ireland.

[1] In 1849 he immigrated to the United States, and practiced architecture in Brooklyn and New York beginning in 1851.

[3] Gaynor frequently utilized cast-iron elements in his architecture, both in New York and San Francisco.

[4] Though much of his work has been destroyed, several of his remaining buildings have been listed on the United States National Register of Historic Places.