balneum, balnea, balneae, balineum, balinea, balineae-all these variants from the Greek βαλανεῖον are found, and were used without distinction, though originally, according to Varro, LL ix. 68, the plural was used only where there was one building for men and another for women. According to Reg. there were 856 in the city. Of the following that are known, almost all are called by the cognomen of the builder or owner.