. G. Schwarz in I.
B. Menckenius, _Scriptores rer. Germ._ (3 vols., Lips., 1728-1730).
It is included in Pelzel and Dobrowsky, _Script. rer. Bohem._ i. pp.
1-282, after collation with Dresden MS., edited very fully by R. Kopke
in _Mon. Germ. Hist. Scrip._ ix. 1-132, and repeated in Migne,
_Patrol. lat._ clxvi. pp. 55-388, and in _Fontes rer. Bohem._ ii.
(1874), 1-370 (Latin and Czech), by W. Wl. Tomek. See A. Potthast,
_Bibliotheca Hist. Med. Aevi_.

COSMATI, the name of a Roman family, seven members of which, for four
generations, were skilful architects, sculptors and workers in mosaic.
The following are the names and dates known from existing
inscriptions:--

Lorenzo (born in the second half of the 12th century).
|
Jacopo (dated works 1205 and 1210).
|
Cosimo ( " " 1210-1235).
|
+---------------+-------------+--------------+
| | | |
Luca Jacopo Adeodato Giovanni
(1231 and 1235). (1231-1293). (1294). (1296 and 1303).

Their principal works in Rome are: ambones of S. Maria in Ara Coeli
(Lorenzo); door of S. Saba, 1205, and door with mosaics of S. Tommaso in
Formis (Jacopo); chapel of the Sancta Sanctorum, by the Lateran
(Cosimo); pavement of S. Jacopo alla Lungara, and (probably) the
magnificent episcopal throne and choir-screen in S. Lorenzo fuori le
Mura, of 1254 (Jacopo the younger); baldacchino of the Lateran and of S.
Maria in Cosmedin, c. 1294 (Adeodato); tombs in S. Maria sopra Minerva
(c. 1296), in S. Maria Maggiore, and in S. Balbina (Giovanni). The chief
signed works by Jacopo the younger and his brother Luca are at Anagni
and Subiaco. A large number of other works by members and pupils of the
same family, but unsigned, exist in Rome. These are mainly altars and
baldacchini, choir-screens, paschal candlesticks, ambones, tombs and the
like, all enriched with sculpture and glass mosaic of great brilliance
and decorative effect.

Besides the more mechanical sort of work, such as mosaic patterns and
architectural decoration, they also produced mosaic pictures and
sculpture of very high merit, especially the recumbent effigies, with
angels standing at the head and foot, in the tombs of Ara Coeli, S.
Maria Maggiore and elsewhere. One of their finest works is in S.
Cesareo; this is a marble altar richly decorated with mosaic in
sculpt