The Trenton Bath House is a building served as the entrance and changing area for outdoor swimming pool by Louis I. Khan. The building is located at 999 Lower Ferry Road, Ewing, New Jersey. In 1984, the building was listed as Historic Places and listed at National Register of Historic Places.
the design of the building is quite simple. The building has four square concrete block rooms with wooden rectangular pyramid roof on top of each rooms. In the corner of the rooms, there is rectangular column with a hollow on it. The column used to support the construction of the pyramid roof and some of the column used as the entrance of the room too. But altough the building has a simple form, Khan showed his thinking about the utilitarian purposes of the various spaces and become his first notion of spaces serving and spaces served.