Most buildings in Bath are made from the local, golden-coloured Bath stone, and many date from the 18th and 19th century. The dominant style of architecture in Central Bath is Georgian; this style evolved from the Palladian revival style that became popular in the early 18th century. Many of the prominent architects of the day were employed in the development of the city. The original purpose of much of Bath's architecture is concealed by the honey-coloured classical façades; in an era before the advent of the luxury hotel, these apparently elegant residences were frequently purpose-built lodging houses, where visitors could hire a room, a floor, or (according to their means) an entire house for the duration of their visit, and be waited on by the house's communal servants. The masons Reeves of Bath were prominent in the city from the 1770s to 1860s.