We went through in early December 2012 and were the only visitors in the museum. It was definitely worth the time to see how the ruling class lived. We were the only people being escorted by our guide and, since it was a quiet day for them, it let us into the dining room which had been closed down to do restoration work on a huge tapestry. The amount of person-hours that restoration work would take is unimagineable, as the threads are very fine and the work very detailed.
At the end of the tour, we left through a servant's stair well and came out in the carriage house/stables. The stalls for the horses and the equipment provided a look into the working side of the residence.
If you own or manage Palazzo Mirto, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.