Definition:Borromean Rings

Definition

The Borromean rings is an arrangement of $3$ interlinked rings such that no $2$ of the rings are themselves linked.

That is, if one of them is removed, then the other $2$ are unlinked.

Historical Note

The Borromean rings were named after the House of Borromeo, a wealthy merchant family who were important politically in the Duchy of Milan in the late middle ages.

They incorporated a design based on these rings on their coat of arms in the $15$th century.