The Singapore Stone is a fragment of a large sandstone slab which originally stood at the mouth of the Singapore River. The large slab, which is believed to date back to at least the 13th century and possibly as early as the 10th or 11th century, bore an undeciphered inscription. Recent theories suggest that the inscription is either in Old Javanese or in Sanskrit, which suggested a possibility that the island was an extension of the Majapahit civilization in the past.