The building, which was deemed eligible for the National Register of Historic Places, was emptied of the fixtures, artwork, and stained glass and left vacant.
It incorporated a simplified neo-Gothic exterior design, along with a distinctive "bell-cast" dome (cupola) atop the steeple.
The interior was extensively decorated by the Lithuanian artist Adolfas Valeška in the early 1950s, including woodwork, a pulpit, stained glass, and several large paintings, among them Our Lady of Fatima, the Good Shepherd, and the Assumption of Mary.
Our Lady of Fatima and the Good Shepherd now reside in St. Joseph Center at the Trinity Heights Marian shrine in Sioux City, along with the European bisque statue of the patron, Saint Casimir, all of which were purchased back from an antiques dealer after having been salvaged from the sanctuary.
Other artifacts were hand-picked by the diocese for placement in the newly renovated Cathedral of the Epiphany and Mater Dei grade school.