The city that can cause a sensory overload

There is so much to see and do in Florence that around a dozen or so visitors every year are admitted to local hospitals with something call "Stendhal Syndrome". The symptoms range from dizziness to exhaustion. It is named after a French tourist whose early nineteenth century visit to Florence overloaded his senses to the point of collapse.
Even if the city's abundance of art treasures, beauty, and historical buildings fail to send you running for medical help, you would be an unusually insensitive person not to feel overwhelmed after a few hours of exploring Florence.
It seems almost incomprehensible how such a compact little city can contain so much. The more you get to know Florence the more it seems there is to learn about it. Never to visit Florence would be a tragedy only surpassed by merely visiting it once.