An upstate New York town violated the constitutional ban against favoring one religion over another by opening nearly every meeting over an 11-year span with prayers that stressed Christianity, a federal court of appeals ruled Thursday.

In what it said was its first case testing the constitutionally mandated separation of church and state, the U.S. Court of Appeals for the Second Circuit ruled the town of Greece, a suburb of Rochester, should have made a greater effort to invite people from other faiths to open monthly meetings. The town's lawyer says it will appeal.

From 1999 through 2007, and again from January 2009 through June 2010, every meeting was opened with a Christian-oriented invocation. In 2008, after residents Susan Galloway and Linda Stephens complained, four of 12 meetings were opened by non-Christians, including a Jewish layman, a Wiccan priestess and the chairman of the local Baha'i congregation.

Galloway and Stephens sued and, in 2010, a lower court ruled there was no evidence the town had intentionally excluded other faiths.

A town employee each month selected clerics or lay people by using a local published guide of churches. The guide did not include non-Christian denominations, however. The court found that religious institutions in the town of just under 100,000 people are primarily Christian, and even Galloway and Stephens testified they knew of no non-Christian places of worship there.