He is credited with founding the shrine to Saint Michael the Archangel on Mount Gargano.
[3] Shortly after his appointment in 491 he received the visions of Saint Michael which led to the establishment of the shrine of Monte Gargano.
[4] He is credited with allegedly persuading the Gothic leader Totila to spare Siponto in 546.
"[N]o historical evidence survives for a Bishop Lawrence, and all signs of his cult date from the mid-eleventh century onwards..."[6] Saint Laurence is patron of the city of Manfredonia.
His relics are now in Cattedrale di San Lorenzo Maiorano, where they were translated in 1327 by Bishop Matteo Orsini from Siponto Cathedral where they lay under the high altar.