The purpose of temples is always to honor the gods, but these states also made art to serve the interests of the state.
Congress thought President Lincoln was being to sincere and forgiving toward the Confederate side of the US (remember that they seceded from the Union and formed their own goverment which started the American Civil War).
. It was created to protect and defend the coastline of Texas and offer protection for the shipping and trade that was desperately needed for the growing republic.