Biographical dictionary of medallists: coin, gem, and seal-engravers, mint-masters, &c., ancient and modern, with references to their works B. C. 500-A. D. 1900; compiled by L. Forrer ...

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COSTA, FREDERICO GASPAR DA (Portzg.). Medallist and Die-sinker,
established in Lisbon. Maker of Orders, Insignia, Decorations, etc.
COSTA (D'ARAUJO), THOMAS (B.D.M., Vol. I, I904, p. 460).
Portuguese Sculptor, born at Oliveira d'Azanaeis; exhibited at the
Paris Salon, I887-I904, and also at Barcelona, I907.
COSTANZI, CARLO (B.D.M., Vol. I, I904, p. 460). Was still
living in I753. The King of Portugal and Pope Benedict XIV.
bestowed orders upon him. The Portrait-cameo of Bened. XIV. was
presented by the Pope to Bologna cathedral. A portrait by Costanzi
of Baron von Stosch (in sapphire) is preserved in the Uffizi Gallery,
Florence; another of Catherine II. of Russia in the Paris Bibliotheque, and a sardonyx-intaglio with head of Phocion in the
Berlin Museum. Cf. A. Thieme, Allgert. Lexikon der bild. Kiinstler.
Costanzi's signature occurs in various forms: CAVALIERE CARLO
COSTANSI, EQUES COSTANSI, K. KOCTANCI, etc.
Several gems by Costansi were reproduced by Tassie (Raspe,
nOS 2789, 11678 (Antinous), I4024, I4026, etc.).
COSTANZI, GIOVANNI (B.D.M., Vol. I, 1904, p. 46i). Born in
I664, died in I754; father of Carlo and Tommaso C.; resided in
Naples, and is known as one of the first gem-engravers in diamond.
The Berlin Museum owns a portrait-intaglio in chalcedony, by
him, of Gordianus Africanus (Winckelmann, Cat., p. 567, n~ 88;
Raspe 12069).
COSTANZI, TOMMASO (B. D.M., Vol. I, 1904, p. 46I). Died in
I747. Cf. Giulianelli, Mlem. d. intagl., 757.
COSTANZO (B.D.M., Vol. I, 1904, p. 462). Medallist and Painter
of Ferrara, worked chiefly in Naples, although his family was
residing in Ferrara. From Naples he was called to Constantinople,
at the same time as Gentile Bellini of Venice, to paint the portrait
of Muhammad II. He returned to Italy after the sultan's death
(2. Sept. I48r). The medallion of Muhammad II., previously
mentioned, is dated I481, and signed OPVS CONSTANTII (a later
copy of this medal occurs without date and the signature CONSTANTIVS F.). This medal, says Mr. Hill, is of great artistic importance
and betrays Pisanello's influence. In I485, C. was in Naples, where
he painted the portrait of the youthful Ferrante d'Este. In August
of that year we find him for a short time at Ferrara. He may be
identical with the painter Costan<o Lombardo, named by Summonte.
On the other hand it has also been suggested that C. is the same
person as Costanio di Moysis of Venice. Cf. G. F. Hill, in Thieme,
Allglem.u Lexikosi, VII, 539, aZnd other sourcess given here.
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