Dwejra

Azure Window (Dwejra)
Former natural arch
View of the Azure Window in 2009
Country	Malta
District	Gozo
Location	Dwejra, San Lawrenz
- elevation	28 m (92 ft)
- coordinates	36°03′12.8″N 14°11′18.1″E / 36.053556°N 14.188361°E / 36.053556; 14.188361

The Azure Window (Maltese: it-Tieqa Żerqa), also known as the Dwejra Window (Maltese: it-Tieqa tad-Dwejra), was a 28-metre-tall (92 ft) limestone natural arch on the island of Gozo in Malta. It was located in Dwejra Bay, within the limits of San Lawrenz, close to the Inland Sea and the Fungus Rock, and was one of Malta's major tourist attractions. The arch, together with other natural features in the area, has appeared in a number of international films and media productions.

The formation was created by the collapse of a sea cave, probably during the 19th century. It consisted of a pillar of rock rising from the sea and joined to the cliff by a horizontal slab. Following decades of natural erosion that caused parts of the arch to fall into the sea, the slab and pillar collapsed completely in stormy weather on 8 March 2017.

The Azure Window developed through sea and rain erosion of a cliff face, progressing from an initial crack, then to a cave and finally an arch. It is not known exactly when the arch came to being, but the entire process is believed to have taken around 500 years. The arch is not mentioned in 17th- and 18th-century descriptions of the Dwejra area, which was already famous due to the nearby Fungus Rock, so it probably did not exist then. Giovanni Francesco Abela's 1647 book Della Descrizione di Malta and De Soldanis' 1746 manuscript Il Gozo Antico-Moderno e Sacro-Profano both mention a Tieqa Żerqa (written archaically as Tieka Szerka) or Għar iż-Żerqa, but this referred to the cave entrance to the nearby Inland Sea. Therefore, it is likely that when the Azure Window formed it inherited its name from this other cave.