The official website for The Settlers of Catan

Question about Artisans & Benefactors Public Feeling - Can I place a Witch on my game partner’s Public Feeling?

Answer

No. The Public Feeling is not a Building, and Witches can only be placed on Buildings.

Note: The Witch belongs to the theme set "Wizards & Dragons", which is part of the Catan Card Game – Expansion Set.