It is the largest church and the tallest building in Hungary. Its inner area is 5,600 m². It is 118 m long and 49 m wide. It has a reverberation time of more than 9 seconds. Its dome, forming a semi-sphere, is situated in the middle, and it has 12 windows. It is 71.5 m high inside, with a diameter of 33.5 metres, and is 100 m high from outside, the stairs count 400 steps counted from the crypt.
The altarpiece (13.5 × 6.6 metres, depicting the Assumption of the Blessed Virgin Mary, by Girolamo Michelangelo Grigoletti) is the largest painting in the world painted on a single piece of canvas.
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