Wat Saravan is a wat in Phnom Penh, Cambodia. It is located to the northwest of the Royal Palace of Cambodia and southwest of Wat Ounalom.It is said to have over 3,400 manuscripts in what has been described as the largest library in the country.A wat (derived from the [P li] word vatthu- r ma) is a monastery temple in Cambodia, Thailand, or Laos. The word "wat" (Khmer: , Thai: , sometimes rendered "vat" when referring to Laos) means "school".