Doing or saying anything that reminds a person of a time when Western civilisation wasn't full of relativist, wet, floppy, angst-ridden, anti-capitalist, Palestine-supporting, multiculturalist pro-EUrs and instead of a time when Christian morality, Roman law, Greek thought and monoculturalism created and maintained an Empire from 753BC to 1453AD.
Look at that Church! It's so Byzantine Power.
Did you like his speech? Yes, it was so Byzantine Power.
Look at THAT! I know... he's so not Byzantine power.