This mound can be found in the right shore of Šešupė. J. Basanavičius guessed that there was a wooden castle, which was burned by crusaders in 1381. What is more, he also said that there was a stone, which held eternal fire for an honors of Thunder. There is a legend, which says that the church was submerged under the rock of the mound. If someone rolled that rock down, the rock would be on the top of the mound in the morning.