Marko Zelenko was born in 1982 in Koper. In 2010 he completed his studies at the Academy of Fine Arts and Design in Ljubljana. He has attended numerous sculpture schools and workshops in Slovenia and Croatia, and spent one academic year in Spain following an Erasmus study exchange program, where he attended the Academy of Fine Arts in Elche. So far, he has had several solo exhibitions in Slovenia and numerous group exhibitions in Slovenia, Italy and Croatia. He has participated in international sculpture symposia in Slovenia and abroad. Since 2012, he has been cooperating with the ZVKDS Ljubljana Restoration Center as an external collaborator. He lives and works in Izola.

With the available stone material, Marko Zelenko thoughtfully designed the concept of his sculpture, intended for installation in the Lucija Park Sonce. Its slightly swollen oval shape blends perfectly with the spiral play of paths and elevations in it. The seemingly perfect shape at the edges is marked by tiny ulcers, boreholes, channels that visually loosen the whole image of the floor plastic, within which the author secretly weaves his story, which can also be seen in the title of the work: Monument to the Unknown Fallen Sea Date.