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The Spanish Arch (Irish: An Póirse) and the Caoċ Arch (Irish: An Póirse Caoċ), are two remaining arches on the Ceann an Bhalla ("Front Wall"). The two arches were part of the extension of the city wall from Martin's Tower to the bank of the River Corrib, as a measure to protect the city's quays, which were in the area once known as the Fish Market (now Spanish Parade). It was constructed during the mayoralty of Wylliam Martin in 1584.

The National Inventory of Architectural Heritage (NIAH) maintains a central database of the architectural heritage of the Republic of Ireland covering the period since 1700 in complement to the Archaeological Survey of Ireland, which focuses on archaeological sites of the pre-1700 period. As of 2020, there are over 40,000 records in the database, including buildings, monuments, street furniture and other structures. The NIAH dataset does not cover Northern Ireland.
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