El Greco (Spanish el 'the', Italian Greco 'Greek'; b. 1541 in Candia, Crete; † 7 April 1614 in Toledo); actually Domínikos Theotokópoulos, (Greek Δομήνικος Θεοτοκόπουλος) was a painter of Greek origin and principal master of Spanish Mannerism and the late Renaissance. He was also active as a sculptor and architect. His artistic work began in Crete, where he trained as an icon painter in the Byzantine tradition. He moved to Venice and came into contact with the art of Titian before settling in Rome. Subsequently, El Greco arrived in Spain in an unexplained manner and moved to Toledo. Despite some conflicts, he was able to assert himself there and stayed until the end of his life.

El Greco mainly painted pictures with religious themes and portraits. In addition, there are a few landscapes and genre paintings. In Venice and Rome he adapted Western pictorial themes and artistic techniques. Thus he turned to oil painting and canvases as a painting ground. Towards the end of his stay in Italy, El Greco found a strong physicality in his figures, which continued in Spain. There he worked on large altar projects and produced portraits of influential people. El Greco often also designed the architectural framework for his altarpieces. His painting developed away from naturalism towards an individual style, as he attempted to find a new expression for spiritual phenomena, and in his later work increasingly referred back to his origins as an icon painter. El Greco enriched Catholic imagery with new subjects and a reinterpretation of familiar iconography. His art was less promoted by the nobility, but supported by intellectuals, clergymen and humanists.

The reception of El Greco was very different over time. With his individual style, he went his own way, which was largely independent of the development of painting in Spain. After his death, his art received little appreciation and was partly ignored. A slow rediscovery of El Greco began in the 19th century, around 1900 he had his breakthrough. This breakthrough was not so much driven by art historians, but by writers, art critics and the artistic avant-garde. He was seen as an important point of reference by modernist artists, especially expressionists, and received in works. In addition, he was used by Spanish artists and intellectuals to strengthen national identity.