 
 <prompt> Wetin be di church of San Tommaso for Formis wey get one mosaic medallion for? Based on di question wey dey before dis one, write one context wey get di answer. E fit be 1 - 20 sentences. Context: <response>: The last great period of Roman mosaic art na di 12th–13th century wen Rome develop im own distinctive artistic style, free from di strict rules of eastern tradition and with a more realistic portrayal of figures in di space. Well-known works of dis period na di floral mosaics of di Basilica di San Clemente, di façade of Santa Maria in Trastevere and San Paolo fuori le Mura. Di beautiful apse mosaic of Santa Maria in Trastevere (1140) dey show Christ and Mary sitting next to each other on top di heavenly throne, di first example of dis iconographic scheme. A similar mosaic, di Coronation of di Virgin, dey decorate di apse of Santa Maria Maggiore. E na work of Jacopo Torriti from 1295. Di mosaics of Torriti and Jacopo da Camerino for di apse of San Giovanni in Laterano from 1288–94 dey thoroughly restored for 1884. Di apse mosaic of San Crisogono na Pietro Cavallini, di greatest Roman painter of di 13th century. Six scenes from di life of Mary for Santa Maria in Trastevere na also executed by Cavallini for 1290. Dis mosaics dey praised for their realistic portrayal and attempts of perspective. There dey an interesting mosaic medaillon from 1210 above di gate of di church of San Tommaso in Formis wey show Christ enthroned between a white and a black slave. Di church belong to di Order of di Trinitarians wey dey devoted to ransoming Christian slaves. 