Dinan (; ) is a walled Breton town and a commune in the Côtes-d'Armor department in northwestern France. On 1 January 2018, the former commune of Léhon was merged into Dinan. Geography Its geographical setting is exceptional. Instead of nestling on the valley floor like Morlaix, most urban development has been on the hillside overlooking the river Rance. The area alongside the river is known as the "port of Dinan", and is connected to the town by steep streets: Rue Jerzual and its continuation outside the city walls, the Rue Petit Fort. The Rance has moderate turbidity and its brownish water is somewhat low in velocity due to the very low gradient of the watercourse; pH levels have been measured at a slightly basic 8.13 within the city, and electrical conductivity of the waters has tested at 33 micro-siemens per centimetre. In the centre of Dinan, the Rance's summer flows are typically low, in the range of . For many years, the bridge over the river Rance at Dinan was the most northerly crossing point on the river, but the tidal power station at the mouth of the estuary, constructed in the 1960s downstream from Dinan, incorporates a 750-metre long tidal barrage, which also serves as a crossing point nearer to the sea. Dinan station has rail connections to Saint-Brieuc, Lamballe and Dol-de-Bretagne. Population Inhabitants of Dinan are called dinannais and dinannaises. Attractions The medieval town on the hilltop has many fine old buildings, some of which date from the 13th century. The town retains a large section of the city walls, part of which can be walked round. Major historical attractions include the Jacobins Theatre dating from 1224, the flamboyant Gothic St Malo's Church, the Romanesque St Saviour's Basilica, Duchess Anne's Tower and the Château de Dinan. A major highlight in the calendar is Dinan's Fête des Remparts. The town is transformed with decoration and many locals dress up in medieval garb for this two-day festival. The festival takes place over the third weekend in July every even-numbered year. Breton language In 2008, 4.97% of primary school children attended bilingual schools. Personalities Prominent people born in Dinan include: Charles Beslay (1795–1878), member of the Council of the Paris Commune Théodore Botrel (1868–1925), poet and singer Maurice Colbourne (1939–1989), actor Yves Guyot (1843–1928), politician and economist Auguste Pavie (1847–1925), explorer and diplomat Charles Pinot Duclos (1704–1772), author Pierre de Porcaro