NEXT DOOR TO the old Saint Vincent de Paul Church, in Cape Girardeau, Missouri, is the former B’Nai Israel Orthodox synagogue, constructed in 1937, and made in a Spanish Colonial Revival style with Moorish elements.
This building was designed by the Saint Louis architect Thomas P. Barnett Jr. who also designed other buildings in Cape Girardeau: he came from a prominent family of architects, his father having designed the Cathedral Basilica of Saint Louis. Reportedly, this synagogue has not been altered since its construction, and the interior remains intact. You can read its nomination for the National Register of Historical Places here.
While we might consider such a style of architecture to be more Islamic than Jewish, understand that the history and art of Spain, which inspired this building, is complex and non-intuitive to those of us more familiar with northern European styles. The New Liturgical Movement tells us of a similarly-decorated ancient Catholic church, in the article Mozarabic Potentialities for Contemporary Church Architecture? This style is largely derived from the arts of the late Roman and Byzantine Empires, and in turn, it inspired the Gothic.
The synagogue closed because the congregation was unable to maintain a quorum for licit liturgies; this in turn was due to the changing economy (most congregants owned their own businesses, but were unable to compete with the suburban malls), and most critically, because of the inability of the youth to find suitable spouses in the region. You can read about its history here.