Blazon: Per fess wavy argent a key bendwise ward in chief azure and of the last a demi-swan rising, wings elevated and displayed of the first
The key is potentially a counterchanged reference to the former municipality of Sauldorf, which was incorporated with five other towns in 1974. The colors of the field and the division are likely from another of these towns, Wasser. The swan may be from a third town, Rast; the nobles of that town formerly bore argent a swan close sable, legged gules.
Blazon: Argent on a cross flory sable between in chief dexter two swords in saltire and sinister two keys in saltire, both azure and gules, five bezants
Crest: On a mural crown or a fountain between a branch of oak leaved and fructed and a branch of beech slipped proper
Supporters: On the dexter a lion sable and on the sinister a horse argent each with a cross formy fitchy pendant from a collar counterchanged
Mantling: Sable lined argent
Motto: Ad summa nitamur (Let us strive for perfection)
The cross flory comes from the arms of John Whitgift, Archbishop of Canterbury, by way of the County Borough of Croyden. The keys and swords refer to the Abbey of St. Peter and St. Paul. The fountain symbolizes the source of the River Wandle, and the white horse is from the arms of the Earls of Surrey.
Blazon: Per quarterly I and IV gules three demi-bendlets sinister in chief or (Ludovisi), II and III gules a demi-dragon rampant or (Boncompagni), overall on a pale argent two keys in saltire, of the field and or, surmounted by an umbraculum shaded of the last and gules, all bound in cord azure (Piombino)
Blazon: Gules a demi-dragon rampant or, on a chief of the field two keys in saltire, argent and or, surmounted by an umbraculum of the last, all bound in cord azure
In 1701, Gregorio Boncompagni’s marriage to Ippolita Ludovisi allowed him to claim the title Prince of Piombino. It had previously been held by Ippolita’s eldest brother Giovanni and then passed to her elder sister Olimpia when he died in 1699. Olimpia died a year later, and the title passed to her sister, and then by right of marriage, her husband. The Boncompagni-Ludovisi family would retain the principality until the French claimed it in the Battle of Marengo in 1800.
The arms in the chief are those of the Gonfalonier of the Church, though it is not clear when they became associated with the principality. It may have been during the brief window of 1501-1503 when Cesare Borgia briefly controlled the area during his tenure as Gonfalonier.