Le Locle is known as a center of Swiss watchmaking, even cited as the birthplace of the industry, with roots dating back to the 1600s. The municipality has been home to manufactures such as Mido, Zodiac, Tissot, Ulysse Nardin, Zenith, Montblanc, Certina as well as Universal Genève, before the latter company relocated to Geneva. The town's history in watchmaking is documented at one of the world's premier horological museums, the Musée d'Horlogerie du Locle, Monts Castle, located in a 19th-century country manor on a hill north of the city. Restored historic underground mills (grainmill, oilmill, sawmill) can be seen in a cave located about one kilometer west of the city center.
The Ancien Hôtel des Postes, Monts Castle and the Museum d’horlogerie, City Hall, the Immeuble, Moulins souterrains du Col-des-Roches (Cave mills in the Col des Roches), the Villa Favre-Jacot and Zenith SA are listed as Swiss heritage site of national significance. It is part of the UNESCO World Heritage Site: La Chaux-de-Fonds/Le Locle, Watchmaking Town Planning (since 2009) and the entire town of Le Locle is part of the Inventory of Swiss Heritage Sites.
References:The Roman Theatre of Mérida is a construction promoted by the consul Vipsanius Agrippa in the Roman city of Emerita Augusta, capital of Lusitania (current Mérida). It was constructed in the years 16 to 15 BCE. One of the most famous and visited landmarks in Spain, the Roman Theatre of Mérida is regarded as a Spanish cultural icon and was chosen as one of the 12 Treasures of Spain.
The theatre has undergone several renovations, notably at the end of the 1st century or early 2nd century CE (possibly during the reign of Emperor Trajan), when the current facade of the scaenae frons was erected, and another in the time of Constantine I (between 330 and 340), which introduced new decorative-architectural elements and a walkway around the monument. Following the theatre"s abandonment in Late Antiquity, it was slowly covered with earth, with only the upper tiers of seats (summa cavea) remaining visible.