What is the main practiced religion in Hungary?

I am Hungarian and was fortunate to be able to visit the beautiful city of Budapest to see family.

Born & raised in Hungary, living in California for 24 years now: as Hungary was a "socialist-communist" state, my parents could not even baptized me in the 1970s in the church. Socialism was the "religion" for long ...

Although, I got the answer correctly, it still surprises me that Christianity is the major religion of Budapest.