Many legends were told about him (he banished the snakes from Ireland). We know that this is not exactly true. There were no snakes in Ireland, and this is a metaphor. The snakes were the 'Pagans' who were banished from Ireland
St Ite founded some monasteries, the most famous convent was founded in Kildare by St Brigid
St Finian of Clonard and St Brendan of Clonfert built monasteries which became centres of learning and culture
St Enda built the 1st monastery on the Aran Islands in 490
The remotest monastery was Sceilig Mhicil/ SkelligMichael on a tiny rocky island 12miles off the Kerry coast
The biggest monastery was founded by St Ciaran at Clonmacnoise in AD 545 beside a busy crossing place on the River Shannon. People from all over Europe came to study there. Many kings are buried at this site