 As a result of Donostia's sprawling in all directions, first into the flatlands shaped by the river Urumea and later up the hills, new districts arose after the walls of the city were demolished in 1863.The first expansion of the old town stretched out to the river's mouth, on the old quarter called Zurriola (a name later given by Council decision to the sand area and the avenue across the river).The orthogonal layout nowadays making up the city centre (the Cortazar development) was built up to 1914 (first phase finished) much in tune with a Parisian Haussmannian style.