A wax museum or waxworks usually consists of a collection of wax sculptures representing famous people from history and contemporary personalities exhibited in lifelike poses, wearing real clothes.
Some wax museums have a special section dubbed the "Chamber of Horrors", in which the more grisly exhibits are displayed. Some collections are more specialized, as, for example, collections of wax medical models once used for training medical professionals. Many museums or displays in historical houses that are not wax museums as such use wax figures as part of their displays. The origin of wax museums goes back to the early 18th century at least, and wax funeral effigies of royalty and some other figures exhibited by their tombs had essentially been tourist attractions well before that.
The making of life-size wax figures wearing real clothes grew out of the funeral practices of European royalty. In the Middle Ages it was the habit to carry the corpse, fully dressed, on top of the coffin at royal funerals, but this sometimes had unfortunate consequences in hot weather, and the custom of making an effigy in wax for this role grew, again wearing actual clothes so that only the head and hands needed wax models. After the funeral these were often displayed by the tomb or elsewhere in the church, and became a popular attraction for visitors, which it was often necessary to pay to view.
The museum of Westminster Abbey in London has a collection of British royal wax effigies going back to that of Edward III of England (died 1377), as well as those of figures such as the naval hero Horatio Nelson, and Frances Stewart, Duchess of Richmond, who also had her parrot stuffed and displayed. From the funeral of Charles II in 1680 they were no longer placed on the coffin but were still made for later display. The effigy of Charles II, open-eyed and standing, was displayed over his tomb until the early 19th century, when all the Westminster effigies were removed from the abbey itself. Nelson's effigy was a pure tourist attraction, commissioned the year after his death in 1805, and his burial not in the Abbey but in St Paul's Cathedral after a government decision that major public figures should in future be buried there. Concerned for their revenue from visitors, the Abbey decided it needed a rival attraction for admirers of Nelson.