The state was named for the Colorado River, which Spanish travelers named the Río Colorado for the ruddy (Spanish: colorado) silt the river carried from the mountains. The Territory of Colorado was organized on February 28, 1861, and on August 1, 1876, U.S. President Ulysses S. Grant signed Proclamation 230 admitting Colorado to the Union as the 38th state. Colorado is nicknamed the "Centennial State" because it became a state a century after the signing of the United States Declaration of Independence.
One of the original Thirteen Colonies, Maryland is considered to be the birthplace of religious freedom in America, when it was formed by George Calvert in the early 17th century as an intended refuge for persecuted Catholics from England. George Calvert was the first Lord of Baltimore and the first English proprietor of the then-Maryland colonial grant. Maryland was the seventh state to ratify the United States Constitution, and played a pivotal role in the founding of Washington, D.C., which was established on land donated by the state.