Tex.Penal Code Ann. § 42.09 (1989) provides in full:

"§ 42.09. Desecration of Venerated Object"

"(a) A person commits an offense if he intentionally or knowingly desecrates:"

"(1) a public monument;"

"(2) a place of worship or burial; or"

"(3) a state or national flag."

"(b) For purposes of this section, 'desecrate' means deface, damage, or otherwise physically mistreat in a way that the actor knows will seriously offend one or more persons likely to observe or discover his action."

"(c) An offense under this section is a Class A misdemeanor."