Saints often become the patrons of places where they were born or had been active. However, there were cases in Medieval Europe where a city which grew to prominence and obtained for its cathedral the remains or some relics of a famous saint who had lived and was buried elsewhere, thus making him or her the city's patron saint – such a practice conferred considerable prestige on the city concerned. In Latin America and the Philippines, Spanish and Portuguese explorers often named a location for the saint on whose feast or commemoration they first visited the place, with that saint naturally becoming the area's patron.
Professions sometimes have a patron saint owing to that individual being involved somewhat with it, although some of the connections were tenuous. Lacking such a saint, an occupation would have a patron whose acts or miracles in some way recall the profession. For example, when the previously unknown profession of photography appeared in the 19th century, Saint Veronica was made its patron, owing to how her veil miraculously received the imprint of Christ's face after she wiped off the blood and sweat.
Professions sometimes get a patron saint who was himself or herself involved in that profession. Lacking such a saint, a profession would get a saint whose conspicuous acts or miracles in some way recall the profession.