On invitation Montse Amoros, AIUTA GB Member and Director U3A Alto Palancia, Castellon, Prof Fernando Marragan Medero, University of La laguna Tenerife and Prof François Vellas, AIUTA President will participate to Geldo International Workshop « El comercio de la sed en la peninsula iberica », Thursday 13th April and Friday 13th April in Geldo (Castellon). This seminar is part of the AIUTA program on Archeological silk road and U3As. Conclusion will be presented to next AIUTA GB in Pamukkale, Turkiye next May 26th.