Whakaotihia te rerenga e whai ake nei:
I te Velvet Revolution i te tau 1989, i tohua a Sion hei kaiwhakaako honohono i te whare pikitia i te Academy of Fine Arts. I uru ia ki tetahi huihuinga mo Art Informel (1991) a i whakaatuhia i te whakaaturanga "Czech Art Informel: Pioneers of Abstraction 1957<unk>1964". I te tau 1993 i whakaatuhia e ia nga whakaaturanga i Roudnice nad Labem, te Václav Špála Gallery i Prague me te Ostrava House of Art. I te tau 1996 i whai ano a Sion i tetahi whakaaturanga i te Whare Whakaaturanga o Rudolfinum i Prague.