Limestone high quality quarried limestone, called Indiana limestone. Many famous buildings in London are built from Portland limestone. Limestone was also a very popular building block in the Middle Ages in the areas where it occurred, since it is hard, durable, and commonly occurs in easily accessible surface exposures. Many medieval churches and castles in Europe are made of limestone. Beer stone was a popular kind of limestone for medieval buildings in southern England. Limestone and (to a lesser extent) marble are reactive to acid solutions, making acid rain a significant problem to the preservation of artifacts made from this stone.
Limestone leaf warbler number of recognised warbler species by 40% to 64. The limestone leaf warbler is known to occur in northern Vietnam and Laos, and also occurs in southern China. The species name, "calciatilis," means "dwelling on limestone", which refers to its natural habitat, which is broadleaved evergreen and semi-evergreen forest growing around limestone karst mountains around 700-1200m in height. This area is known for its unusual wildlife and includes the Annamite mountain range of Laos. The species name, calcialtilis, means “dwelling on limestone”, which along with its common name is a reference to its natural habitat, which is broadleaved evergreen and