The last mosaic has the inscription:

VOTIS XXX MVLTIS ❧ XX BIS XX CVRANTE YACINTHO COMITE FABRICA AD SVMMVM PER DVCTA ES CVLMEN

Translation

For vows on the thirtieth anniversary of the rule of the emperor, and more (vows) for (another) twenty years, and twenty more years again. Under the care of Hyacinthos holding an office, building, to the highest summit, you were drawn.

Notes

Edit: I thought it was Constantine I, but it is more likely the emperor is Constantius II based on numismatic evidence. For comite, see L&S s.v. comes II.E.

Source: https://www.reddit.com/r/latin/comments/17u5r49/can_someone_help_with_the_translation_i_can_only/ Translated by u/lutetiensis

Those are some spectacular patterns! They remind me of the ‘celtic knot’.