Detail of wax seal from RCSI 1784 Charter with George III depicted on horseback RCSI was founded in 1784 by a royal charter being granted by King George III. The recently conserved charter can be seen here with it's large wax seal intact. These wax seals were very important as they authenticated the document they were attached to. A seal was a device which made an impression in wax, clay, paper. The seal with a unique and specific design was pressed into the wax, clay or embossed on to paper by the author 'sealing' their name, rank, power, honour to the document. Most seals have always given a single impression on an essentially flat surface. But in medieval Europe two-sided seals with two matrices were often used by institutions or rulers (eg. towns, bishops, aristocracy, royalty) to make two-sided or fully three dimensional impressions in wax, with a 'tag' (a piece of ribbon running through them attaching them to the document). These 'pendant' sea...