WATCH: Israeli Archaeologists Present Crusader Treasure

More than 700 years after they were hidden, 108 gold coins were discovered in a Crusader fortress near Herzliya.

Archaeologists from Tel Aviv University and the Nature and Parks Authority revealed Monday the unprecedented treasure that was discovered last week in a dig in the Apollonia National Park, near Herzliya.

The excavation began three years ago as part of work to prevent the collapse of the cliff on which the Crusader fortress in the Apollonia park stands. Since then the diggers have discovered numerous findings shedding light on the Crusaders in general and on the last days of the 13th century fortress in particular.

The 400-gram gold stash, found concealed inside a potsherd under tiles in one of the rooms of the Crusaders castle, is currently valued at over $100,000.

The cache consists of 108 gold coins, 93 of them comprised of 4 grams of gold and worth about a dinar each and 15 coins worth a quarter of a dinar, comprised of 1 gram of gold each. The coins were minted in Egypt some 250 years before being buried in the fortress' floor.

Findings include hundreds of arrow heads and catapult stones from the battle in which the Mamluks conquered the castle from the Crusaders. In a landfill dug at the site diggers found shards imported from Italy and rare glass utensils.

The fortress on the coast line and the city beside it were ruled at the time by the Christian order of the Knights Hospitaller, and was one of the Crusaders' most important strongholds in the center of the country. In March 1265 the Mamluk Sultan Baybars stormed the city and captured it after 40 days of siege. The site, abandoned in ruins, has not been inhabited since.

Researchers assume one of the fortress' leaders hid the treasure in a bid to prevent the Muslim conquerers from finding it, perhaps hoping to retrieve it again some day. "I think the stash was deliberately buried in a partly broken vessel, which was then filled with sand and laid under the floor tiles," said the head of the Apollonia digging team, Professor Oren Tal of TAU. "So if anyone found it he would think it's a broken pot and pay no attention to it."