Complex sentence: This reference is problematic, since the citadel of Smyrna had been razed by Timur; according to Kastritsis, this may have been a mistaken reference to Ayasoluk, unless the citadel of Smyrna had been rebuilt by Süleyman in the meantime.
Split into simpler sentences: This reference is problematic, since the citadel of Smyrna had been razed by Timur. According to Kastritsis, this may have been a mistaken reference to Ayasoluk, unless the citadel of Smyrna had been rebuilt in the meantime.