Complex sentence: Peritas'death, however it happened, was a venerable one; much like Alexander's horse Bucephalus, Peritas had a city named after him with a monument to his glory in its central square.
Split into simpler sentences: Peritas'death, however it happened, was a venerable one. Like Alexander's horse Bucephalus, Peritas was awarded a city named in his honor with a monument to his glory in its central square.