Diocesan Museum - Church of Sant'Agostino

One of Trapani's oldest buildings, this medieval church dates back to 1101 and still stuns with its Gothic façade and ornate rose window. It's been repurposed as a diocesan museum — the Polo Espositivo Sant'Agostino — so you can step inside and explore religious art and artifacts in a genuinely ancient setting. Worth noting: opening hours are inconsistent, so check ahead before making the trip.