Metro-Goldwyn-Mayer consultant not involved in the process, said "It's a prudent move for them. Downsizing and relocating to a space that is still prominent but not overly ostentatious and burdened by expenses is fundamental for their survival." MGM vacated its namesake tower on August 19, 2011. The studio's official motto, ""Ars Gratia Artis"", is a Latin phrase meaning "Art for art's sake". It was chosen by Howard Dietz, the studio's chief publicist. The studio's logo is a roaring lion surrounded by a ring of film inscribed with the studio's motto. The logo, which features Leo the Lion, was created by Dietz
Artis Library library was able to stock its shelves. In 1881, librarian Gilles Janse compiled a catalogue of the Artis Bibliotheek’s collection holding 4,381 items. The Artis Bibliotheek grew to include more than 16,000 titles. From 1848 to 1995, the Zoological Society Natura Artis Magistra published the journal "Contributions to Zoology". All issues of this journal are now in the Artis Bibliotheek collection. Initially, Westerman kept many of the library’s items in his home; the collection, however, has been housed in its own building at the zoo since 1859. In 1868 the collection was moved to the building on the Plantage Middenlaan.