[1] The original congregation consisted of 13 men and 10 women; it met in temporary quarters until a new building could be erected for it (1908-1909).

The church has ties to several historic religious communities in Lancaster, notably St. James Episcopal Church (also in the Historic District) and the Lancaster Theological Seminary, but the Unitarian Universalist building is newer and represents the last era of generally acknowledged architectural distinction in the city.

[5] The interior underwent extensive renovation in the 1920s, including installation of stained-glass windows by the firms of Franz Xaver Zettler (sanctuary and vestibule) and Charles Connick (women's parlor).

[6] Subjects memorialized in the windows include colonizer Christopher Columbus and enslaver Thomas Jefferson.

[7] The choices were influenced by the views of a founding member of the church, Milton T. Garvin (1860-1936), a prominent local merchant and philanthropist who personally funded the construction and decoration of the building and worked closely with the architects and ministers involved.