Amman Citadel Inscription: Proto-Canaanite Recreation (plaster cast) about 6 by 4 3/4 inches. about 900 BC. Proto0-Canaanite was used by the Ammonites. This inscription was discovered in the ancient citadel of Amman, Jordan which sits on the ancient site of Rabbath-Ammon. The inscription is thought to be a building foundation plaque.