This white, mid-15th century bridge designed by Paskoje Miličević leads from land and over a ditch to the Outer Ploče Gate. You must pass through two more gates before entering Dubrovnik. On the right is the massive Revelin Fortress. This citadel was finished in 1549 in response to a potential attack by the Venetians. A more lethal attacker was the plague. So for centuries the city had a strict policy that all visiting merchants and seamen must be quarantined for 40 days. The only remaining lazaretto or detention building from 1642 can be seen a few steps before crossing this bridge.