A license plate that declares Texas "One State Under God" went on sale this week, despite an outcry from critics who say government tags shouldn't be endorsing religion. 

The license plate, which was narrowly approved in December by the governing board at the state's Department of Motor Vehicles, also features the words and image of the Crosses at Calvary, the site where the Crucifixion of Jesus is said to have occurred. Each plate costs $55, with some proceeds going to a group that works with underprivileged children.

Despite criticisms from religious liberties groups since the board's 4-to-3 approval, the specialty license plate was made available Monday for drivers to order online at www.myplates.com.

I think you want to be very careful when you give government the authority to favor a particular religion in an official way such as this, Dan Quinn, communications director for the Texas Freedom Network, told FoxNews.com.