"To call Guanajuato an old mining town hardly does it justice. It's perhaps better described as the one-time location of the world’s largest silver extraction site, a town founded and made fabulously wealthy after the Spanish struck gold and silver in the early 16th century. Nueve 25 Hotel Boutique is one of a handful of luxury hotels in the UNESCO-honored historic center, the name a reference to the precious metal — a composition of at least 92.5% pure silver is required for the denomination of sterling silver — that put Guanajuato on the map." - Tablet Hotels