Today, 581 years ago, in the year 1439, Rabbi Avigdor Kara passed away in Prague.
R’ Avigdor’s gravestone was the oldest surviving stone in the old Jewish cemetery of Prague, where the Maharal and more gedolei Yisroel are buried [currently the original gravestone is in the Meislove Shul, and a replica has been set in its place].
Before this cemetery was used, there was another Jewish cemetery outside the Jewish quarter, of which we have a report saying that Rashi is buried there (location: Michelangelo Grand Hotel).1https://firstname.lastname@example.org,14.4211667,3a,37.5y,115.07h,84.98t/data=!3m6!1e1!3m4!1sWn6puwJ5RyZrGpWmKf-mtg!2e0!7i16384!8i8192
R’ Avigdor composed Selichos, and the famous poem Echad Yachid UmYuchad, sung after the Alyiah of a Chassan on Shabbos Aufruf.
Source: Gal Ed no. 2