 On top of the high-rise, and visible across Berlin, is a large metal star-in-a-circle symbol, the logo of car manufacturer Mercedes-Benz.It weighs 15,000 kg, has an outer diameter of 10 metres, completes approximately two revolutions a minute, and glows at night with the help of 681 fluorescent tubes.The shopping mall initially comprised an ice rink (closed in 1974) and the "Royal Palast" cinema, with the world's largest projection screen at the time of its opening in 1965 (closed in 2004).