sentences:  It is the widest canal in the center of Amsterdam, namely one hundred Amsterdam feet, that is .The Keizersgracht was dug later than the Prinsengracht (which was dug in 1614), while the Keizersgracht is the second canal of the three main canals.In September 1614 the idea was born to turn Keizersgracht into a chic boulevard without water, following the example of Lange Voorhout in The Hague.