Dumbarton Oaks Research Library and Collection is an institute in Washington, DC, administered by the Trustees for Harvard University. It supports research and learning internationally in Byzantine, Garden and Landscape, and Pre-Columbian studies through fellowships and internships, meetings, and exhibitions. Located in residential Georgetown, Dumbarton Oaks welcomes researchers at all career stages who come to study its books, objects, images, and documents. It opens its doors to the public to visit its historic Gardens, designed by Beatrix Farrand; its Museum, with world-class collections of art; and its Music Room, for lectures and concerts. The institute disseminates knowledge through its own publications (such as Dumbarton Oaks Papers and symposium volumes) as well as through the Dumbarton Oaks Medieval Library (published by Harvard University Press). Dumbarton Oaks also makes accessible ever more of its resources freely online.
The Dumbarton Oaks online catalogue is an ongoing project to record the 17,000 Byzantine lead seals held by Dumbarton Oaks and publish them online. From this page you can browse or search the collection, learn about sigillography and download tools to help teachers present sigillography to their students.