John Keay, the "Great Bath" of Mohenjo Daro in present-day Pakistan was the size of 'a modest municipal swimming pool', complete with stairs leading down to the water at each one of its ends. The bath is housed inside a larger—more elaborate—building and was used for public bathing. The Great Bath and the house of the priest suggest that the Indus had a religion. Japan The origin of Japanese bathing is , ritual purification with water. After Japan imported Buddhist culture, many temples had saunas, which were available for anyone to use for free. In the Heian period, houses of prominent families, such as the families of court nobles or samurai, had baths. The bath had lost its religious significance and instead became leisure. became , to bathe in a shallow wooden tub. In the 17th century, the first European visitors to Japan recorded the habit of daily baths in sexually mixed groups. Before the mid-19th century, when Western influence increased, nude communal bathing for men, women, and children at the local unisex public bath, or , was a daily fact of life. In contemporary times, many, but not all administrative regions forbid nude mixed gender public baths, with exceptions for children under a certain age when accompanied by parents. Public baths using water from (hot springs) are particularly popular. Towns with hot springs are destination resorts, which are visited daily by the locals and people from other, neighboring towns. Roman Empire The first public thermae of 19 BC had a rotunda 25 metres across, circled by small rooms, set in a park with an artificial river and pool. By AD 300 the Baths of Diocletian would cover , its soaring granite and porphyry sheltering 3,000 bathers a day. Most Roman homes, except for those of the most elite, did not have any sort of bathing area, so people from various classes of Roman society would convene at the public baths. Roman baths became "something like a cross between an aqua centre and a theme park", with pools, exercise spaces, game rooms, gardens, even libraries, and theatres. One of the most famous public bath sites is Aquae Sulis in Bath, England. Dr. Garrett G Fagan, a professor at Pennsylvania State University, described public bathing as a "social event" for the Romans in his book Bathing in Public in the Roman World. He also states that "In Western Europe only the