Murallas Merinies can be accessed via Avenida Blas Infante: you can still see the remains of the Medieval walls with its four flanking towers, moat, barbican, bridge and entry gate dating back to the 13th century. Baños Merinies, Parque María Cristina is the restored remains of the 13th century royal baths of ‘al-binya’. Museo Municipal, Ortega y Gasset is situated in a fine 19th century building the ‘Casa de los Guardeses’ it was refurbished in 1995 and has two floors divided into seven galleries. In Galleries 1-4 there are exhibits from prehistoric to the early middle ages and in 5-7 there are more modern and contemporary items. Plaza Alta, this area was first laid out and named the Plaza Alta in 1724 by the Marques de Verboon when he repopulated the town. It was developed into a formal square in 1807 by General Castaños. Today it is still the nerve centre of the town and the current main square was re-laid out in 1930. It is a fine example of the effect that the Ibero-Americana Exhibition in Sevilla in 1929 had on civic design. Barrio de San Isidro is the old quarter of Algeciras dating back to the 18th century. Make sure to visit the plaza and church of the same name. The church in Ruiz Tagle houses the image of San Isidro – the patron saint of agricultural workers.