Below is a survey of bank notes of the world which feature architects. This list is by no means complete, but I think I found all the notes which feature architects.
Le Corubusier, 10 Swiss Franc note
Scan donated by Ricardo Ramirez G.
Gustaive Eiffel, 200 French Franc
Scan donated by Scan donated by Steve Burke
Alvar Aalto, 50 Finnish Markkaa
Scan provided by Régis Giampersa via Bank Note World
Joze Plecnik, 500 Slovenia Tolarjev
Scan provided by Matthew Patay via Bank Note World

Gian Lorenzo Bernini, 5000 Italian Lire
scan donated by Roberto Cacciamani via Bank Note World

Otto Wagner, 500 Austrian Shillings
Scan donated by Aare Olander via Bank Note World
Victor Horta, 2000 Belgian francs
Scan donated by Tod Hunt via Bank Note World
Johann Balthasar Neumann, 50 Deutsche Mark
Scan provided by Peter Kuckenburg via Bank Note World