Isn't it a jewel of a house after its kind?

这不是一座独一无二的房子的瑰宝吗？

The fortress was Sweden's military pride and joy. With five miles of walls and hundreds of cannon, it was the second mightiest fort of its kind in Europe after Gibraltar.

要塞是瑞典军队的骄傲和喜悦。 它拥有五英里长的城墙和数百门大炮，是欧洲仅次于直布罗陀的同类堡垒中第二强大的堡垒。