beauty-of-the-humanity:Mausoleum of Galla Placidia, Ravenna, Italy; 5th centuryEarly Christian monum
beauty-of-the-humanity:Mausoleum of Galla Placidia, Ravenna, Italy; 5th centuryEarly Christian monument, formerly part of bigger Christian temple St Croce, known for interior with beautiful mosaics covering the whole walls -- source link