It is unlawful to willfully write, make marks or draw characters on the walls or any other part of any church, college, academy, schoolhouse, court house or other public building, or on any furniture, apparatus or fixture therein; or to willfully injure or deface the same, or any wall or fence enclosing the same.
(Iowa Code § 716.1) (1999 Code, § 42.08) Penalty, see § 10.99