Newark Castle is a ruin located just outside the town of St Monans, on the east coast of Fife, Scotland. Building on the site probably dates back to the 13th century at which time the Scottish king Alexander III (1241 - 1286) spent some of his childhood there. Since that time, the site has passed through several rebuilding phases, and it is most likely that the ruins currently visible are the remains of buildings constructed under the ownership of David Leslie in the 17th century and the Sandilands family who owned the castle since the 15th century when they gained the estate through marriage.