A monogram is a motif made by overlapping or combining two or more letters or other graphemes to form one symbol.
FII = Franciscus Iosephus Imperator (Franz Joseph I of Austria)
VR = Victoria Regina (Victoria of the United Kingdom)
EIIR = Elizabeth II Regina (Elizabeth II of the United Kingdom)
EVIIR = Eduardus VII Rex (Edward VII of the United Kingdom)
EIIR = Elizabeth II Regina
Monogramm Friedrichs des III.. Enthalten ist die Devise „aeiou“
Medieval-style IHC monogram (Iota-Eta-Sigma, based on "lunate" sigma)
The Labarum (or Chi Rho) symbol of Christianity (the first two letters of "Christ" in Greek).
Monogramme of Laurens Girard
Detail of etching “Mary and St. Anne (St. Elisabeth ?)“ from Daniel Hopfer
Albrecht Dürer's monogram on a table
Vereenigde Oostindische Compagnie VOC (Dutch East India Company)