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.
Shining Path Path snipers killed three police officers in the Ene Apurimac Valley. Shining Path The Communist Party of Peru - Shining Path (), more commonly known as the Shining Path (), is a communist revolutionary organization in Peru, espousing Marxism-Leninism-Maoism. When it first launched the internal conflict in Peru in 1980, its goal was to overthrow the state by guerrilla warfare and replace it with a "New Democracy". The Shining Path believed that by establishing a dictatorship of the proletariat, inducing a cultural revolution, and eventually sparking a world revolution, they could arrive at full communism. Their representatives stated that existing