The 19th Century research collection contains photostatic copies of correspondence created while structuring the Catholic Church in Texas and the establishment of the Diocese of Galveston.

Contains materials related to Archie Gress and his wife Joan Penzenstadler’s service organization involvement and their advocacy efforts. The materials include correspondence, programs, presentations, reports, and publications.

The Bishop Vincent M. Harris papers encompass the personal life, priestly and episcopal career of Harris, the first Bishop of the Diocese of Beaumont and second Bishop of the Diocese of Austin.

The Bishops of Texas collection is comprised of photographs, newspaper clippings, pastoral letters, correspondence, and ephemera of several Catholic bishops collected by the Catholic Archives of Texas.

Financial documentation, correspondence, minutes, printed material, programs, scrapbooks, clippings, and photographs, created, collected, and maintained by the Catholic Daughters of the Americas, document the organization's activities: administrative, charitable, and social, at the local, state, and national levels.

The Texas Diocese collection consists of ephemera, newspaper clippings, publications, and written works from Catholic dioceses in Texas collected by the Catholic Archives of Texas.

The Catholic Institutions collection consists of newspaper clippings, publications, correspondence, and other materials relating to Catholic institutions in Texas.

The Catholic Lay Mission Corps (CLMC) was a volunteer organization for recent Catholic college-graduates to teach a year at an underfunded parish school in exchange for a small stipend. Correspondence, printed material, and photographs comprise the Catholic Lay Mission Corps collection.

The Catholic Newspapers and Periodicals collection contains newspapers from the 15 (arch)dioceses in Texas.

Correspondence, financial, and legal documents, certificates, and creative works document the personal and professional life of Charles S. Taylor as well as three associates: brother-in-law Adolphus Sterne, son Lawrence S. Taylor, and law partner Ashbel Green.

The story of Catholic and Protestant clergy's attempts to relate the Gospel in three South Texas towns (Crystal City, Pearsall, and Cotulla) experiencing changing Mexicano/ Anglo relationships during the period of 1945-1975.

The Joan E. Penzenstadler photograph collection documents the organizations and events of the Catholic Church in Texas.

Thirty-four newspaper articles, collected and presented to the State Deputy of the Texas Knights of Columbus by St. Edward's Council # 2559 as part of its entry in the 1931 contest for the Daliet Historical Trophy.

The Knights of Columbus Supreme Council collection contains publications and convention materials from the national level of the Knights of Columbus.

The collected papers of Lino Perez, Jr., who served the Texas State Council of the Knights of Columbus, in various offices for more than 25 years.

The Liturgical Text collection contains liturgical books of the Roman Rite in several languages, containing the words and actions of the Catholic liturgy.

The Men and Women Religious collection contains promotional materials, newspaper clippings, histories, and correspondence of religious orders in Texas.

The Menger Family photograph collection includes photographs of parishes or schools published in the Southern Messenger newspaper and personal photographs of Henry, Ella, Hank, and Matt Menger.

The Mexican Religious Question collection includes correspondence, photographs, newspaper clippings, and manuscript drafts regarding the temporary establishment of a seminary for Mexican Catholic exiles during the Cristero War.

This collection contains records from the Poor Clare Sisters of Brenham, Texas. The materials include financial records, correspondence, photographs, prayer books, publications, audio-visual materials, and artifacts that document the monastery’s Cuban origins and the activities of the Poor Clare Sisters in Texas.

The papers of Monsignor Oberste (1899-1983), author of works on Irish colonists in Texas, the missions at Refugio, and other locations in South Texas; parish priest at Our Lady of Refuge, Refugio, from 1933-1969.

The records of the San Antonio Province of the National Council of Catholic Women contain correspondence, financial records, photographs, history of the province, and records of individual diocesan chapters.