Dumbarton Oaks was able to make important purchases at several auctions of renowned Byzantine collections (see list of collectors, dealers, and donors), buying pedigreed and prestigious coins. For example, we acquired the third known specimen of Matthew Kantakouzenos (BZC.2006.17) at the “Despot” [Protonotarios] sale 2006 LHS 97, Zurich, where many coins came from the Millas collection sold in Zurich at Leu 10, 29 May 1974. We also secured the rare silver trikephala of the joint reign of Michael VIII and Andronikos II (BZC.2006.11 and BZC.2009.10) from the Protonotarios collection. In 2015 we acquired from Michael D. O’Hara’s Nachlass two virtually unpublished anepigraphic silver coins, identified as Constantine IV and Justinian II from their portraits (BZC.2015.043 and BZC.2015.044), that complete the pattern of Byzantine issues in Sardinia, while the Munich Sternberg 35th sale in October 2000 produced an extremely rare follis of Herakleios with the mint mark “Jerusalem” (BZC.2001.5).