Who was theodora? what role did she play in the nika revolution?

Was empress of the Byzantine Empire and the wife of Emperor Justinian I. She was one of the most influential and powerful of the Byzantine empresses. Theodora proved herself a worthy and able leader during the Nika riots. There were two rival political factions in the Empire, the Blues and the Greens, who started a riot in January 532 during a chariot race in the hippodrome. The riots stemmed from many grievances, some of which had resulted from Justinian's and Theodora's own actions.

Theodora was the most powerful woman in Byzantine history.

The answer is all of the above.

i believe the answer is  the similarity is that both are sacrifices which have the same purpose and sacrifice - jesus christ, but the difference is in offering of that sacrifice.

 

the similarity is that both are sacrifices which have the same purpose (repenting our sins) and sacrifice - jesus christ.  the difference is in the way of the offering that sacrifice. the sacrifice of jesus on the calvary is sacrifice of his actual living body and blood, but the sacrifice of the mass is the sacrifice of the jesus through bread (body) and blood (wine). in the sacrifice on calvary jesus was offered for us; while at mass he offers himself through us.