The tile mosaic depicting the Croatian, Dalmatian, and Slavonian coats of arms is St. Mark's best-known feature. Inside, the church is rather ordinary except for some 20th-century frescoes depicting scenes from the Bible and a Mestrovic crucifix. Hours are variable and posted on the door, but not always observed by the folks who have the key to the church. Call to be sure it's open. The church is always open for Mass at 6pm Monday through Saturday, and for 7:30, 11am, and 6pm Mass on Sunday and holidays.