Born in 1977 in Sofia, Bulgaria. Works in the field of installation and participatory art. He studied mural painting at the National Academy of Arts, Sofia, (1997-1999) after which he graduated from the AKI Academy for Art & Design (1999-2004), and DAI-Dutch Art Institute (2004-2006) in Enschede, the Netherlands. In 2006, he returned to Bulgaria and specialized in Film Directing at the National Academy for Theatre and Film Arts (2007-2009). In 2006 he made his film debut with the short film „Falling on the Fovea”, a joint project accomplished with Kristina Yanachkova, which participated in „The Projection Project” exhibition at the MuHKA Museum of Contemporary Art in Antwerp. Valentinov has numerous participations in exhibitions and festivals in Bulgaria and abroad (among them: Biennale de Kunstvlaai, Amsterdam; Sofia Design Week Festival, Contempo International Art Festival, TEDxBG, Space SSEE Gallery, Daejeon, South Korea, CEC Artslink Residency in Cincinnati, USA, ICA - Institute of Contemporary Art, Sofia, SAMCA - Sofia Arsenal - Museum for Contemporary Art, Bulgaria, Vienna Contemporary - Focus Bulgaria).