The "Pentakiklon" ('Five-ring' sculpture) has its own story; placed in the square in 2001, it never functioned fully as initially conceived by the architect, as it was meant to be a motion sculpture when water run in it. During the Christmas of 2008, when water ran in the sculpture for the first time, it transformed the circles into motion. After that, more years passed with the piece falling back into neglect, until it was refurbished once more and permanently restored to its initial concept of a motion sculpture, during the 2020 restoration of the whole square. At the same time the famous round fountain, which acted as a landmark for decades, was redesigned and re-installed.