Rialto, a contraction of rivo alto — high banks — was first settled in the ninth century and became the financial and commercial center of Venice. A pontoon bridge across the Grand Canal was built in 1181, linking Rialto to St. Mark’s. It was replaced in 1255 with a wooden drawbridge consisting of two inclined ramps meeting in a central platform that could be raised to let masted ships pass. Ships from everywhere were unloaded at the markets and warehouses of Rialto. Rialto was the leading international marketplace in Europe, the hub of the Silk Road and Mediterranean trade routes, where both comestibles (fruit, vegetables, fish, meat, cheese) and a treasure trove of merchandise from the east including spices, precious metals, gemstones, perfumes, and luxury fabrics. Slaves were sold until 1366 when slave trading was banned from Rialto.