Q:Given the following context:  Briarcliff Manor is home to seven Christian churches and two synagogues; three churches (Holy Innocents Anglican Church, Saint Mary's Church and Scarborough Presbyterian Church) are in Scarborough. Other churches in the village are All Saints' Episcopal Church, St. Theresa's Catholic Church, Faith Lutheran Brethren Church, and Briarcliff Congregational Church (United Church of Christ). Jewish synagogues Congregation Sons of Israel and Chabad Lubavitch of Briarcliff Manor & Ossining are in Chilmark.Saint Mary's Episcopal Church, founded in 1839 by William Creighton as Saint Mary's Church, Beechwood, is Briarcliff Manor's oldest church; it was reincorporated in 1945 as Saint Mary's Church of Scarborough. The granite church was built by local stonemasons and paid for by Creighton's wealthy neighbors, including Commodore Matthew Perry, James Watson Webb, William Aspinwall, and Ambrose Kingsland. The church is in near-original condition, with a design based on the 14th-century Gothic St. Mary's parish church in Scarborough, England and the only church with a complete set of William Jay Bolton stained-glass windows. The church, built in 1851, is a contributing property to the National Register-listed Scarborough Historic District. The 338-acre (137 ha) Sleepy Hollow Country Club surrounds the church grounds on three sides. Notable parishioners included Commodore Matthew C. Perry and Washington Irving. Irving, author of "Rip Van Winkle" and "The Legend of Sleepy Hollow", brought the ivy surrounding the church from Abbotsford (home of Walter Scott). On July 5, 2015, Saint Mary's Episcopal Church closed after 175 years in operation; the Church of South India's Congregation of the Hudson Valley moved in that November.Scarborough Presbyterian Church, given to the community by Margaret Louisa Vanderbilt Shepard and her husband Colonel Elliott Fitch Shepard (who lived on the nearby Woodlea estate), was the first church in the United States with an electric organ. Built in 1895 and designed by Augustus Haydel (a nephew of...  answer the following question:  When was the only church with a complete set of William Jay Bolton stained-glass windows first founded?
A:
1839