Proprietary Colony: This is a type of British colony especially in North America and Caribbean with all land owned by one person who had full governing rights. Maryland, under Lord Baltimore, was an example of this.
Catholicism: The faith, practice, and church order of the Roman Catholic Church. This was the religion that Lord Baltimore practiced and wanted to protect in his new colony.
Charter: A written grant by a country's legislative or sovereign power. Lord Baltimore received such a charter from King Charles I to establish the colony of Maryland.