"I was invited to attend the lustrical"

This was the ceremony in which the baby was purified and named. The child would also be presented with a bulla, a locket containing charms to ward off evil, only removed once the child had ‘grown up’ – for a boy, on the day he received his toga virilis (a symbol of citizenship received on reaching adulthood), and on the wedding day for a girl. See a picture of a replica bulla here.