and led an uprising of Maryland Protestants against the Catholic Proprietor. Calvert was soon forced to flee southward to Virginia. He returned at the head of an armed force in 1646 and reasserted proprietarial rule. Leonard Calvert died of an illness in the summer of 1647. Before he died, he wrote a will naming Margaret Brent (the sister of Giles and a future, historically famous planter, lawyer, and female advocate for women's rights) as the executor of his estate. Calvert also named his friend and fellow passenger aboard The Ark and The Dove, Thomas Greene, as his successor to the governorship. In 1890, the State of Maryland erected an obelisk monument to Calvert and his wife at Historic St. Mary's City which had a historical district created to commemorate the colonial origins of the colony. Leonard Calvert's lost grave The location of Leonard Calvert's grave has been lost to history, but there is an effort underway to find it. Archeologists based in the Historic St. Mary's City research complex believe that Leonard Calvert is buried somewhere in St. Inigoes, Maryland. The most likely spot has been narrowed down to somewhere on Webster Field, now a small U.S. Naval Aircraft facility located on the water on the Western side of St. Inigoes. Several archeological digs have been conducted but the supposed grave has not been discovered. Members of the Calvert family in the settlement were known to be buried in lead coffins. It is not known if this is how Leonard Calvert was buried. His death, due to disease, happened suddenly and unexpectedly after a period of religious warfare had wracked the colony. Soon after his death, one of the first laws requiring religious tolerance was written and enacted in the colony, further codifying its original proprietarial mandate of religious tolerance and reestablishing peace. See also List of colonial governors of Maryland References Dictionary of American Biography Base Set. American Council of Learned Societies, 1928–1936. External links Calvert Family Tree Images of Leonard Calvert on the State of Maryland online archives 1606 births 1647 deaths English emigrants Colonial Governors of Maryland Leonard St. Mary's County, Maryland St. Mary's City, Maryland English Roman Catholics Younger sons of barons