50 State Quarters to form what is known as a "mule". Only sixteen of these specimens, produced on dollar planchets, escaped from the mint. A 2005 Minnesota double die quarter, as well as a 2005 Minnesota quarter with extra trees (another die error), have both triggered numismatic interest. An unusual die break on some 2005 Kansas quarters created a humpback bison. Relatively more common are Kansas quarters bearing the motto "IN GOD WE RUST." The United States produces proof coinage in circulating base metal and, since 1992, in separately sold sets with the dimes, quarters, and half-dollars in silver. For the silver issues,
Quarters of Rome (the remaining part of the Agro Romano was divided into zones in the same year). Quarters of Rome The Quarters of Rome (Italian: "quartieri di Roma") are the areas in and around the Italian city of Rome which became urbanised after the foundation of the last city-centre rione, Prati. They form the second level of administrative sub-divisions of Roma Capitale. Together they cover 171.38 km and hold 1483913 inhabitants. The first 15 quarters were officially founded and numbered in 1926, after first being drafted in 1911. As of 1930 there were two more unofficial quarters: the quarter XVI, which was