 George Calvert , 1st Baron Baltimore ( <unk> – 15 April 1632 ) was an English politician and <unk> . He achieved domestic political success as a Member of Parliament and later Secretary of State under King James I. He lost much of his political power after his support for a failed marriage alliance between Prince Charles and the Spanish House of Habsburg royal family . Rather than continue in politics , he resigned all of his political offices in 1625 except for his position on the Privy Council and declared his Catholicism publicly . He was created Baron Baltimore in the Irish peerage upon his resignation . Baltimore Manor was located in County Longford , Ireland . 
