True! Hope this helped :)
He doubled the size of the empire and ruled much of the Mediterranean world.
He created a code of law that helped unite the Byzantine Empire and later served as a model for the codes of law in many modern nations.
He built a huge domed cathedral called the Hagia Sophia, an enormous underground aqueduct, and a fabulous palace complex.
those are the answers for K12, OHVA to be exact
Seems that you may need to provide your own information that you’ve gained! you haven’t included the crash course video. i would recommend watching the video over and picking out 3 things that you learned. i’ve seen crash course videos before (not the one above of course) and they’re very easy to understand and there’s TONS of info, it’s quite easy to pick out three things :)