OLOMOUC World Heritage The Holy Trinity Column Holy Trinity Column The monumental Holy Trinity Column is the dominant feature of Horní náměstí (Upper Square). This 32-meter-high Baroque work with ornate plaster decorations by Olomouc stone mason Václav Render was listed as a UNESCO world heritage site in 2000. It is the tallest Baroque sculptural group in the Czech Republic and also the largest grouping of Baroque statues within the same sculpture in Central Europe.