 The first curator, at the time officially titled "government philatelist", was Joseph Britton Leavy who was retained in 1913 to help organize the collection which had rapidly expanded due to a large donation from the Post Office the preceding year.As of 2018, the curator is Daniel Piazza.The United States owns another stamp collection – the Postmaster General's Philatelic Collection, composed of United States stamps and stamp proofs – which was established in the 1860s and is managed by the United States Postal Service for archival and recordkeeping purposes.