donated $3 million for the naming right for the plaza, but it was SBC Plaza when the park opened, as a merger had changed the company name to SBC Communications. The 2005 merger of SBC and AT&T Corporation led to the name AT&T Plaza. In 2021, the Grainger Foundation established a $5 million endowment to support the ongoing enhancement of the plaza (now called Grainger Plaza) and Cloud Gate. The sculpture and the Grainger Plaza are located on top of Park Grill, between the Chase Promenade and McCormick Tribune Plaza & Ice Rink. The plaza has become a place to view the McCormick Tribune Plaza & Ice Rink. During the holiday season, the plaza hosts Christmas caroling. Cloud Gate, dubbed "The Bean" by Chicagoans because of its legume-like shape, is a three-story reflective steel sculpture. The first public artwork in the United States by world-renowned artist Anish Kapoor, the privately funded piece cost $23 million, considerably more than the original estimate of $6 million. Composed of 168 stainless steel plates welded together, its highly polished exterior has no visible seams. It is and weighs . Its smooth shape and mirror-like surface were inspired by liquid mercury. It reflects the city skyline, particularly the historic Michigan Avenue "streetwall", and the sky. It provides striking reflections of visitors, who can walk around and under its high arch. On the underside is the "omphalos" (Greek for "navel"), a concave chamber that warps and multiplies reflections. The sculpture builds upon many of Kapoor's artistic themes, and is a popular photo subject with tourists. After Kapoor's design for the sculpture was selected in a design competition, numerous technological concerns regarding its construction and assembly arose, in addition to concerns about the sculpture's upkeep and maintenance. Experts were consulted, some of whom believed the design could not be implemented. Eventually, a feasible method was found, but the sculpture's construction fell behind schedule. Cloud Gate was unveiled in an incomplete form during the Millennium Park grand opening celebration, as the grid of welds around each metal panel was still visible. The sculpture was concealed again while it was completed; in early 2005, workers polished out the seams. Cloud Gate was formally dedicated on May 15, 2006, and it has since gained considerable popularity, domestically and internationally. Crown Fountain The Crown Fountain is an interactive work of public art and video sculpture, named in honor of Chicago's Crown