Hundreds of Corsicans, Italians, French, Portuguese, Irish, Scots, and Germans, attracted by the offers of free land by the Spanish Crown, moved to the colony of Puerto Rico and accepted the conditions. As soon as these settlers swore their loyalty to the Spanish Crown and their allegiance to the Roman Catholic Church, they were given a "Letter of Domicile". After five years, the settlers were granted a "Letter of Naturalization" that made them Spanish subjects.