Mourning for Constantine at Rome; and the Honor paid him there through Paintings after his Death
On the arrival of the news of the emperor's death in the imperial city, the Roman senate and people felt the announcement as the heaviest and most afflictive of all calamities, and gave themselves up to an excess of grief. The baths and markets were closed, the public spectacles, and all other recreations in which men of leisure are accustomed to indulge, were interrupted. Those who had erewhile lived in luxurious ease, now walked the streets in gloomy sadness, while all united in blessing the name of the deceased, as the one who was dear to God, and truly worthy of the imperial dignity. Nor was their sorrow expressed only in words: they proceeded also to honor him, by the dedication of paintings to his memory, with the same respect as before his death. The design of these pictures embodied a representation of heaven itself, and depicted the emperor reposing in an ethereal mansion above the celestial vault. They too declared his sons alone to be emperors and Augusti, and begged with earnest entreaty that they might be permitted to receive the body of their emperor, and perform his obsequies in the imperial city.
Source: Life of Constantine (New Advent)