Nafplio or Nafplion is a coastal city located in the Peloponnese in Greece. It is the capital of the regional unit of Argolis and an important tourist destination. Founded in antiquity, the city became an important seaport in the Middle Ages during the Frankokratia as part of the lordship of Argos and Nauplia, held initially by the de la Roche following the Fourth Crusade before coming under the Republic of Venice and, lastly, the Ottoman Empire. It later served as the first official capital of the modern Greek state, from 1827 to 1834.