Teilo was a leader of the
Celtic Christian church in
Wales during the
6th century. (His dates of birth and death are unknown.) He was a contemporary of
Saint David, with whom he probably travelled to
Jerusalem on
pilgrimage. Teilo is believed to have been bishop of
St David's. Bones found in
St. David's Cathedral during restoration work at the turn of the 21st century were thought to be his, but scientific dating proved otherwise. Like most of the Welsh "saints" of this period, Teilo was a monastic leader, and founded a "llan" or monastic settlement which gave its name to the town of
Llandeilo[?] in
Carmarthenshire. Several other places bear his name, and he is also believed to have preached or taught in
Brittany. He is one of the patron saints of
Llandaff Cathedral, and is supposed to have founded the original monastery at
Llandaff.
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