For a period the closest black church to the Fifth Ward was St. Nicholas, located in the Third Ward, about away. In the 1920s a group of Louisiana Creole people attended the Our Lady of Guadalupe Church because OLG was the closest church to Frenchtown. Because the OLG church treated the Creole people in a discriminatory manner, by forcing them to confess and take communion after people of other races did so and after forcing them to take the back pews, the Creoles opted to build their own church. In order to acquire funds, Creole families hosted dinners, dances, and parties. They served Louisiana Creole cuisine, using the food to acquire the means to build the church. In 1928 the Roman Catholic Diocese of Galveston-Houston purchased two city blocks along Sumpter Street: the 4000 block and the 4100 block. On April 28, 1928, the groundbreaking occurred. The building was completed in the northern hemisphere spring of 1929. The Josephite Society financed the church. The Our Mother of Mercy Catholic Church was officially founded in June 1929. On June 9, 1929, Galveston-Houston bishop Byrne blessed the church. The school opened several years later. The church became a diocesan church on June 30, 1930. The school, Our Mother of Mercy School, opened as a school for grades 1 through 12 in the 1930s. A convent and rectory were established on the property. Works Progress Administration employees wrote about the church in the 1930s. Tyina L. Steptoe, author of Houston Bound: Culture and Color in a Jim Crow City, stated that they "noted the centrality of the church" to area residents. By World War II, over half of Houston's black Catholics had attended the church, and over 4,000 black children, both Catholic and non-Catholic, had attended its school. Other black churches in Acres Homes, Sunnyside, Trinity Gardens, and other communities used Our Mother of Mercy as a feeder church.
Recreation
Historically the church sponsored bazaars and dances. Alcohol was sold at the bazaars. The practices of drinking alcohol and dancing communities differed from those of Protestant communities in Texas, which had historically prohibited drinking alcohol and did not have dancing to popular music during church events.
School
Our Mother of Mercy Catholic School opened in fall 1930 or fall 1931, and closed in Spring 2009. When it opened it served grades 1-12. The initial teaching force was the New Orleans-based Sisters of the Holy Family. The school was consolidated with the St. Francis of Assisi School. As of 2009 the OMM school, which at that time was a PreK-8 school, had its annual tuition as $3,000.
