- en-academic.com dic.nsf/enwiki/986319It was inaugurated in 1778. Notable events related to Puerta de Alcalá. * In 1823, the Puerta de Alcalá was showered by a burst of cannon shrapnel.
- tr.wikiital.com wiki/Puerta_de_AlcaláŞimdiki zamandan önce başka bir Puerta de Alcalá vardı. Tuğladan inşa edilmiş ve biraz daha batıda, şimdiki calle de Alfonso XI'de bulunuyordu .
- expedia.co.th en/Puerta-De-Alcala-Salamanca.…Today the Puerta de Alcalá stands at the near centre of Madrid, though it once marked the city’s eastern extremity and the road to Alcalá de Henares.
- Alchetron.com Puerta-de-AlcaláIn 1985, Spanish singers Ana Belén and Víctor Manuel popularized the song "La Puerta de Alcalá", one of their greatest hits, titled after this monument.
- latlong.net place/puerta-de-alcal-madrid-spain-…Located at Plaza de la Independencia, 1, Puerta de Alcalá is one of the most important and almost iconic landmark of Madrid, Spain.
- britannica.com place/Puerta-de-Alcala…de la Independencia and the Puerta de Alcalá (a gateway originally built in 1599 and rebuilt in 1778).
- everipedia.org wiki/lang_en/Puerta_de_AlcaláThe Puerta de Alcalá ("Alcalá Gate", from the Arabic word القلعة al-qal'a, "citadel") is a Neo-classical monument in the Plaza de la Independencia in Madrid, Spain.
- barcelo.com guia-turismo/en/spain/madrid/things-…The history of the Puerta de Alcalá actually pre-dates its construction, as it was built on the site of an earlier, sixteenth-century gate.
- jbinnacle.com tag/puerta-de-alcala/Carlos III is also responsible for the design of the modern version of one of the former wall gates, called the gate to Alcalá, the nearby town, Puerta de Alcalá.