Blazon: Or a stag trippant gules within a bordure parted nebuly argent and azure
The stag is a counterchanged version of that in the arms of Sigmaringen. It is possible that the tinctures of the bordure are derived from the arms of the lords of Wildenstein, who were the first recorded owners of the town, but this is pure speculation.
Blazon: Vert a pale wavy or within a bordure argent charged with five horseshoes sable, on a chief of the second between two lozenges a cresset sable fired proper
Crest: On a wreath of the colors the battlements of a tower proper issuant therefrom between two croizers or an oak tree also proper fructed and ensigned by a crown of fleurs-de-lis of the first
Supporters: On the dexter a unicorn argent armed and crined or gorged with a collar pendant therefrom a cross flory gules; on the sinister a leopard proper gorged with a collar gules pendant therefrom a fleur-de-lis or
Mantling: Vert lined or
Motto: Per laborem progredimur (By hard work we progress)
The pale wavy evidently represents the river Amber, while the lozenges and cresset symbolize the coal and iron industries. The horseshoes on the bordure are taken from (one of the versions of) the arms of the Ferrers family.
Blazon: Argent a cross of Santiago within a bordure gules charged with eight castles triple-towered or windowed azure
The cross of Santiago is drawn from the Order of Santiago, which held the region from 1275 to 1554, and the castles on the bordure are a reference to the Kingdom of Castile, of which the town has always been a part.
Blazon: Per quarterly I and IV or a bull passant gules on a base vert within a bordure of the field charged with eight flames of the last (Borgia), II and III per quarterly i and iv azure three fleurs-de-lis or, ii and iii gules (Albret)
Cesare’s arms show the Borgia’s family arms quartered with those of his wife, Charlotte d’Albret, sister of King John III of Navarre. They married in 1499, and she bore Cesare’s only legitimate child, Louise Borgia.
Blazon: Per pale argent a cross of Santiago gules and azure on a base proper a castle triple-towered or, all within a bordure of the second charged with eight castles triple-towered of the fourth windowed of the third
The castle that appears in the arms and gives the town its name is at least 800 years old, probably older. The settlement that eventually became Castellar de Santiago may have begun in the fortress once it was no longer used for defensive purposes.