1. Primary and official records
Texas Historical Commission Atlas records, National Register documentation, parish and congregation websites, diocesan records, official tourism offices and original archival records lead on dates, designations, current access and property identity.
2. Public-history and scholarly research
Austin PBS, university archives, architectural-history sources, books and documented decorative-painting research are used to explain artists, techniques, iconography, immigrant context and unresolved attribution questions.
3. Reputable secondary reporting
Texas Monthly, major newspapers and established travel publications are used for interpretation and discovery, but a church is not added solely because a travel story calls it a Painted Church.
4. Discovery sources
Dedicated church catalogs, travel blogs, Wikimedia categories and image-search pages can surface candidates. They trigger verification; they do not substitute for it.