We turn now to the church of S. Giovanni Battista which was founded by a certain Baduarius, according to Agnellus, and consecrated by S. Peter Chrysologus. It is possible that Baduarius was the mere builder, and that he built by order of Galla Placidia. Nothing, however, is left of the old church, which was entirely rebuilt in 1683, except the apse as it is seen from the outside, the round campanile in its first story and the beautiful columns sixteen in number, four of bigio antico, two of pavonazzetto, one of cipollino, and the rest of greco venato, according to Dr. Ricci. * * * * * There remains to be considered what is, when all is said, I suppose the noblest monument of the fifth century left to us in Italy or in Europe--the Mausoleum of Galla Placidia. Agnellus tells us that the Augusta built close to her palace a great church in the shape of a Latin cross. This she dedicated in honour of the Holy Cross which it will be remembered her predecessor S. Helena had discovered in Jerusalem. Of this church, though it has long since disappeared--the "western" part of it having been destroyed in 1602 and what remained restored out of all recognition in 1716--we know a good deal. According to Agnellus it was covered with most precious stones (? marbles) and apparently with mosaics and was full of splendid ornaments. It had, too, a great narthex, and at the end of this Galla Placidia presently built a cruciform oratory for her own mausoleum, where she was to lie between her brother Honorius and her son Valentinian. [Illustration: Colour Plate THE MAUSOLEUM OF GALLA PLACIDIA] The Mausoleum of Galla Placidia is the oldest complete building left to us in Ravenna, for it dates from well within the first half of the fifth century, whereas the baptistery, altered and transformed as it was by S. Neon, is as we see it a work of the first years of the second half of that century. Simple as it is, without, a cruciform building of plain brick, within it is so sumptuously and splendidly adorned that not an inch anywhere remains that is not encrusted with mosaic or precious marbles. These mosaics were, before their radical "restoration," perhaps finer and more classical than those of the baptistery. It might seem, indeed, that they were perhaps the finest and subtlest work done in the Roman realistic tradition, nor was there perhaps anywhere to be found so noble a representation of the Good Shepherd as that which adorned this great monument. It is, however, impossible to speak with any confidence of what we see there now, for all has been restored again and again, and is now little better than a _rifacimento_ of our own time, a copy, faithful perhaps, but still a copy, of the work of the fifth century.