Complex sentence: It contains three sarcophagi including one belonging to the 1395-died daughter of Süleyman Pasha, the eldest son of Orhan I, the second bey of the newly established Ottoman Empire.
Split into simpler sentences: It contains three sarcophagi, including one belonging to the daughter of Süleyman Pasha. Pasha was the eldest son of Orhan I, the second bey of the newly established Ottoman Empire.