The butterfly (study) Štěpán Zavřel Original bibliographical reference Die Blumenstadt, text by Eveline Hasler, illustrations by Štěpán Zavřel, Bohem Press, Zürich, 1987 Other editions The city of flowers, text by Eveline Hasler, illustrations by Štěpán Zavřel, Bohem Press Italia, Trieste, 2019 Technique watercolor Measures 37,5 x 55,8 cm Year 1987