The exact date is not known .
It must have been before 24 February 1498 , since a building contract with that date describes the construction of a stone house in Trpanj for Stjepan Gradi .
The exact date is not known but it must have been before 24 February 1498 , since a building contract with that date describes the construction of a stone house in Trpanj for Stjepan Gradi .