'Astronomicum Caesareum' with Ian Fowler

Listen to expert Library staff discuss some of the extraordinary items in the Polonsky Exhibition of The New York Public Library’s Treasures.
Maps, History, and Government Information Curator Ian Fowler explores the lavishly designed 'Astronomicum Caesareum' and some of the other cartographical wonders in the exhibition.
Learn more: www.nypl.org/treasures
This video was made with support from Bloomberg Philanthropies.