[6][7] A representative of the International Galleries of Chicago was contracted to purchase Yatridès's works, which were sold to private collectors in Canada and the United States.

[2] From 1957 to 1965, he held solo exhibitions in the United States,[7][8][9][10] Canada, Latin America, Switzerland, Great Britain and Greece, where his works were acquired by private collections[11] and a museum.

The following decade he studied in Grenoble at the Commissariat à l'énergie atomique et aux énergies alternatives (CEA) to research light and color.

[15] Events from the 1980s include: On 17 January 1996, "Yatrides et son siècle" council was established to protect the public, civil and professional interests of Yatridès's works.

[18][nb 2] Sacha Bourmeyster, a semiology specialist, states that the Yatridès slab communicates supernatural life in a manner similar to that in 2001.