You know that in 1900 communists were not yet in power in Romania. Do you have a "paper proof" that they were married in Bucharest? I am sure you know that Bucharest is a large city with few churches.You might have to hire a researcher to do the research. What documentation have you tried to locate?Were your ancestors naturalized citizens? Did they have social security numbers?Did you look in 1930 census?That is the one that will tell if they were Na - naturalized, Al - alien, Pa (papers).