durable and prone to heavy erosion and wear over time, especially when compared to slate or schist graves of the same time period. Brownstone began losing popularity among carvers during the first few decades of the 1800s owing to the rising popularity of marble though it continued to be used for obelisks and other grave monuments until much later. Brownstone used for headstones was usually quarried from the Connecticut River Valley and New Jersey, and many grave carvers especially in Connecticut, New York and New Jersey carved from it. Quality Brownstone was deemed "not really much good as a building material" by Vincent Scully, professor emeritus of the history of art at Yale University. Brownstone was popular because it is unusually easy to carve and quarry, but these qualities also made houses clad in it susceptible to weathering and damage over time. See also Besançon, France, noted for building façades made of stone from the Chailluz Quarry Dimension stone Greystone Hummelstown Brownstone Company Railroad apartment Sandstone References External links NPS Article on the Brownstone quarries of Wisconsin's Apostle Islands. Website devoted to the Weser brownstone quarries from Germany being imported into the US. "After Fight, a Brooklyn Brownstone's Costly Rescue" The New York Times, March 31, 2010. Website devoted to the colonial-era Quaker Mill House in Pennsylvania. Rittenhouse Square, Philadelphia Fairmount, Philadelphia Back Bay, Boston 19th-century architecture Sandstone House styles Culture of New York City Building stone