- Created by: Todd Whitesides
- Added: 29 Feb 2016
- Find a Grave Memorial 158734274
Find a Grave, database and images (https://www.findagrave.com : accessed ), memorial page for Janusz Piast of Warsaw I (unknown–8 Dec 1429), Find a Grave Memorial no. 158734274, citing Saint John's Archcathedral, Warsaw, Miasto Warszawa, Mazowieckie, Poland ; Maintained by Todd Whitesides (contributor 47553735) .