I was here in 2007 but I missed all the rupestrian churches, the painted churches, the churches with frescoes. So this trip was to make up for what I missed. This time I had a guide. Sasso (sassi) means hollow because the whole gorge has been hollowed out to make places for dwellings. It was later that facades were made to frame the doorway and Matera began to acquire this look. From these two pictures, it doesn't look like anything has changed. But it has. Today both sassi, Barisano and Caveoso has been refurbished and occupied or at least 60% at least. It still look ancient.