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.
Name of Croatia Name of Croatia The name of Croatia () derives from Medieval Latin "Croātia", itself a derivation of the native ethnonym, earlier "Xъrvatъ" and modern-day . The first attestation of the term is in the Latin charter of duke Trpimir from 852, whose original has been lost. A copy has been preserved in a 1568 transcript; Lujo Margetić has proposed in 2002 that the document is in fact of legislative character, dating to 840. In it is mentioned: The oldest stone inscription is the Latin Branimir Inscription (found in Šopot near Benkovac), where Duke Branimir is mentioned: The earliest written monument