Michał Sapka's website

Music Monday: That One Time When Iron Maiden Played at a Polish Wedding

Every monday I will try to post some music, just to bright up someone’s day. I stole this idea from Ruben Schade.

Yup, this really happened in 1984.

part of the recording on Youtube

It seems (according to Fakty TVN) the band got lost while looking for some late-night booze and somehow ended up on the weeding. They played two songs.