Complex sentence: The town became part of the Principality of Moldavia in 1359 and the fortress is enlarged and rebuilt in 1407 under Alexander the Kind and in 1440 under Stephen the Great.
Split into simpler sentences: The town became part of the Principality of Moldavia in 1359. The fortress was enlarged and rebuilt in 1407 under Alexander the Kind and in 1440 under Stephen the Great.