[matt1234]

Under his rule, based at Constantinople, large stone-carrying ships laden with prefabricated marble church interiors were sent out from quarries around the Sea of Marmara to sites in Italy and North Africa.

Prior to Justinian's rule, these areas had fallen out of Roman control, but he regained them for Rome. Presumably, these churches were part of his effort to reestablish control.

[Insigne123]

Did Justinian get that ancient North African emperor Husseinus Obamas angry by letting in christians?

[The_Reader_David]

Prior to Justinian's rule, these areas had fallen out of Roman control, but he regained them for Rome the Empire. Presumably, these churches were part of his effort to reestablish control.

One of the place that had been lost to direct Imperial control was Rome itself, so it is a bit odd to say "he regained them for Rome," though "Roman control" is perfectly appropriate, since the Empire understood itself to be the Roman Empire right down to its fall to the Ottomans in 1453 -- particularly when he did not move the capital back or install a co-Emperor in the West.