A Coruña is a city and municipality of Galicia, Spain. It is the second-largest city in the autonomous community and seventeenth overall in the country. The city is the provincial capital of the province of the same name, having also served as political capital of the Kingdom of Galicia from the 16th to the 19th centuries, and as a regional administrative centre between 1833 and 1982, before being replaced by Santiago de Compostela. A Coruña is a busy port located on a promontory in the entrance of an estuary in a large gulf (the Portus Magnus Artabrorum of the classical geographers) on the Atlantic Ocean. It provides a distribution point for agricultural goods from the region. Although much of the heavy industry is based on the shipyards and metalworks of the neighbouring city of Ferrol, there is an oil refinery in A Coruña itself. A Coruña is located on a peninsula, and its isthmus was at times formed only by a small strip of sand. Erosion and sea currents caused a progressive accumulation of sand, enlarging it to its present dimensions. A Coruña is one of only eight pairs of cities in the world that has a near-exact antipodal city. Half of these antipodal pairs are in Spain/Morocco and New Zealand – with Christchurch, New Zealand as A Coruña's antipode. The climate of A Coruña is temperate maritime and heavily moderated by the Atlantic Ocean. In short, the climate more closely resembles the oceanic climate that is common in the Pacific Northwest region of North America. Autumn and winter are often unsettled and unpredictable with strong winds and abundant rainfall, coming from Atlantic depressions and it is often overcast. The ocean keeps temperatures mild, and frost and snow are rare. In summer, it is quite dry and sunny with only occasional rainfall, temperatures are warm but rarely uncomfortably hot due to the sea's cooling influence during the day. Spring is usually cool and fairly calm.