Thonburi (Thai: ธนบุรี) is an area of modern Bangkok. During the era of the kingdom of Ayutthaya, its location on the right (west) bank at the mouth of the Chao Phraya River had made it an important garrison town, which is reflected in its name: thon (ธน) a loanword from Pali dhána wealth and buri (บุรี), from púra fortress.