Sorrento-Stabian Diocesan Museum

Tucked beneath the cathedral of Castellammare di Stabia, this small but fascinating museum displays artifacts excavated directly under the church, spanning the 2nd through 6th centuries AD. Since the nearby Antiquarium is currently closed, this is genuinely your best shot at seeing relics from ancient Stabiae. Quiet and under the radar, it even offers a printed English-language guide so you won't be lost without context.