Mariánské Lázně (Czech pronunciation: [ˈmarɪjaːnskɛː ˈlaːzɲɛ]; German: Marienbad) is a spa town in the Karlovy Vary Region of the Czech Republic. It has a population of about 13,000. The town, surrounded by green mountains, is a mosaic of parks and noble houses. Most of its buildings come from the town's Golden Era in the second half of the 19th century, when many celebrities and top European rulers came to enjoy the curative carbon dioxide springs.