“Designed” might not be the precise word, though: Pyle didn’t so much design the window as paint a picture that was, in essence, “translated” by stained-glass artisans.
The window was destined for - and, presumably, commissioned by - the Colonial Club of New York, which had moved into a handsome new building on Broadway and 72nd Street the previous year. The subject was Anthony Van Corlaer, and the work has generally been known by the title “Antony Van Corlear [sic], the Trumpeter of New Amsterdam”. Then again, it could be argued that the “official” title is that which Pyle lettered on the work itself:
ANTONIVS VAN CORLEARVS TVBIC
EN PRO NOVELLO AMSTERDAMO
That, though, might not be too reliable: “My Latin is very loose,” Pyle later wrote (in reference to a mistake in the first printing of his Story of King Arthur), “and I am afraid that I always depend too much on the text reader to help me with that - as well as with my dreadful spelling.”
At any rate, Pyle seems to have been proud of his painting: on March 18, 1893, he welcomed invited guests to his Wilmington studio to take a look at it. And although it has since gone missing, we can take a look at it, too, courtesy of an article on “Window Making as an Art” by William H. Thomas in The Munsey Magazine for December 1901.
Although Pyle completed the painting in 1893, the window may not have been completed and installed in a Colonial Club stairway until 1896. Then, in 1903, the clubhouse went into foreclosure and over the next 80 or 90 years the building underwent a series of modifications and renovations before ultimately being demolished. The window somehow weathered these storms, however, and it now belongs to the Delaware Art Museum. It measures 65.5 x 39.5 inches, and Pyle’s painting most likely is (was?) of similar dimensions. Maybe it weathered some storms, too, and will show up one day.