 
 <prompt> Which one of dem no dey use to keep dead bodi: mausoleum, crypt or rotunda? Based on di last question, write a context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: With di building of Christian basilicas for di late 4th century, wall and ceiling mosaics dey use for Christian purposes. Di earliest examples of Christian basilicas no dey survive, but di mosaics of Santa Constanza and Santa Pudenziana, both from di 4th century, still dey exist. Di winemaking putti for di ambulatory of Santa Constanza still dey follow di classical tradition in say dem represent di feast of Bacchus, wey symbolize transformation or change, and so e dey appropriate for a mausoleum, di original function of dis building. For anoda great Constantinian basilica, di Church of di Nativity for Bethlehem di original mosaic floor with typical Roman geometric motifs dey partially preserved. Di so-called Tomb of di Julii, near di crypt beneath St Peter's Basilica, na 4th-century vaulted tomb with wall and ceiling mosaics wey dem give Christian interpretations. Di Rotunda of Galerius for Thessaloniki, wey dem convert into a Christian church during di course of di 4th century, dey embellished with very high artistic quality mosaics. Only fragments dey survive of di original decoration, especially a band wey dey depict saints with hands raised in prayer, for front of complex architectural fantasies. 