Set in the Hall of Architecture, the Carnegie Trees display has been a Pittsburgh tradition for years. It also features the 17–18th century Neapolitan 'presepio,' an elaborate Nativity scene comprised of over 100 figurines. This year, the hall hosts a collaboration between the Carnegie Trees and the #CarnegieInternational, which are both celebrating their 57th anniversaries. . The display is on view any day the museum is open, and is free with admission. . Photos: Tom Little #CMOAcollects #HolidaysAtTheMuseums