Robert Cary Long Jr. (1810–1849) was the son of a late 18th Century - early 19th Century famous architect Robert Cary Long Sr. of Baltimore, Maryland and was himself a well-known 19th Century architect. Like his father, Cary was based in Baltimore. Life Robert Cary Long Jr. was educated at St. Mary's College in Baltimore, Maryland. Upon graduating, he trained with Ithiel Town at the office of Martin E. Thompson in New York. A significant portion of Town's work was in the Federal and Greek revival and Gothic revival styles. After the death of his father in 1833, Long returned to Baltimore and continued the practice. One of his early commissions was a finishing school, the Patapsco Female Institute, designed in 1834. He and William Reasin designed the Lloyd Street Synagogue in Greek Revival style. Long was the preferred architect of Episcopal Bishop William Rollinson Whittingham, for whom he designed Mount Calvary Church. The Gothic Revival gateway at Green Mount Cemetery dates to 1839. The Cathedral of Our Lady of Sorrows in Natchez, Mississippi was designed around 1842. The on-site supervising architect was James Hardie. The bishop of Natchez was John J. Chanche, former president of St. Mary's College. Two years before, Long had designed for Chanche a steeple for the 1806 seminary chapel which had been designed by Maximilian Godefroy. The church in Natchez is similar to Long's contemporary Church of St. Alphonsus in Baltimore. The diocesan see was later translated to Jackson; the building was designated St. Mary Basilica in 1998. The Church of St. Alphonsus was commissioned by the Redemptorists who had come to Baltimore to tend the German-speaking Catholics. The work entailed not only the Gothic Revival church, but a convent and rectory, both brick Georgian townhouses, and St. Alphonsus Halle. Construction took place between 1842 and 1845, and was Long's first major project. The church is designed in Southern German neo-Gothic style. The attached rectory served as the provincial headquarters for the Redemptorist Fathers and Brothers. Baltimore Old St. Paul's Episcopal Church (Third Building, 1812, destroyed by fire) National Shrine of St. Alphonsus Liguori listed on the National Register of Historic Places (NRHP) St. Peter the Apostle Church, listed on the National Register of Historic Places (NRHP) Mount Calvary Church (Episcopal/Anglican/now Roman Catholic) Lloyd Street Synagogue, NRHP listed Green Mount Cemetery, NRHP listed Franklin Street Presbyterian Church and Parsonage, NRHP listed Govans Presbyterian Church, 1844.