Mikasa in a comparison of preserved warships

What is the largest preserved warship or submarine outside the United States?

Mikasa is the tentative answer, with ships preserved in China set aside.

Mikasa is the tentative choice for the largest preserved non-US warship, with Belfast dismissed as smaller. The comparison rests on the rarity of preserved battleships outside the United States. A later comment raises Minsk in China, but that case is set aside because the attraction is closed and its status is not pursued.