The Marzamemi “church wreck” was discovered in 1959.
See:
- Justin Leidwanger et Elizabeth S. Greene: The Marzamemi Shipwreck Excavation: A Late Antique Church under the Sea: INA Quarterly 2017; 43.3/, pp. 8-13. - http://nauticalarch.org/wp-content/uploads/2015/07/Featured-Article.pdf