A federal court has ordered a Rhode Island public high school to remove a prayer mural from its auditorium.

Jessica Ahlquist, a teenage atheist student, sued Cranston city and Cranston High School West officials, claiming the mural promotes religion and is offensive to non-Christians.

City officials said the mural is an historical artifact and serves no religious purpose.

The prayer depicted on the mural encourages students to strive academically. It begins with the words "Our Heavenly Father" and ends with "Amen."

A U.S. District Court judge ruled in favor of the student on Wednesday.