Sigillography
（重定向自Sphragistics）
Sigillography (sometimes referred to under its Greek name of Sphragistics) is one of the auxiliary sciences of history. It refers to the study of seals attached to documents as a source of historical information. It concentrates on the legal and social meaning of seals, as well as the evolution of their design. It has links to diplomatics, heraldry, social history, and the history of art.