The current flag of San Antonio, Texas, isn't too terrible:
(Image from
Wikimedia Commons)
When flown along with the U.S. national and Texas state flags, it creates the odd processional quality of the the white stars, the blue fields, and the red stripes becoming sequentially smaller the higher the rank:
(Image from
runyib.com)
However, the largely unused coats of arms probably speaks more to the historicism the city would like to convey, even if the arms were drawn in ye olde yesteryear of 1972:
(Image from
Heraldry of the World)
Much more officially used is the city seal, based on an original wood carving crafted in 1925:
(Image from
City of San Antonio)
If it were up to me, we would be emblazoning our city with more Hapsburg double-headed eagles as is mounted over the historic Spanish Governor's Palace:
(Photo from
Theodore's Royalty & Monarchy Site)