Several popes attempted to improve navigation on the Tiber in the 17th and 18th century, with extensive dredging continuing into the 19th century. Trade was boosted for a while but by the 20th century silting had resulted in the river only being navigable as far as Rome itself. The Tiber was once known for its floods â the Campus Martius is a flood plain and would regularly flood to a depth of 2 metres (6 ft 7 in).
Franz Anton Mesmer. The modern era of hypnosis and hypnotherapy really begins with Franz Anton Mesmer (1734-1815), the Viennese physician who left the word âmesmerismâ to posterity. For various reasons, he also gave hypnosis the rather unsalubrious reputation that still persists in some quarters today.
Wilhelm Wundt opened the Institute for Experimental Psychology at the University of Leipzig in Germany in 1879. This was the first laboratory dedicated to psychology, and its opening is usually thought of as the beginning of modern psychology. Indeed, Wundt is often regarded as the father of psychology.