What is the big church in Buda?

Excuse me, could you please elaborate on the significance of the large church in Buda? Is it a historical landmark, or does it hold a special religious or cultural importance in the region? What is its name, and what are some of the key features or attractions that make it stand out? Additionally, could you provide some context on its significance to the community and the city of Buda as a whole? Thank you for your time and consideration.