Prad am Stilfserjoch'ss/ Prato allo Stelvio's oldest church, St. Johann, is located in the village’s southeast in a green meadow landscape at the gateway of the high Alpine Ortler mountains. John the Evangelist and John the Baptist are honoured as patron saints.

St. Johann's Church was built at the beginning of the 13th century by the Counts of Tschengelsberg for there own use. It was designed in Romanesque style and pastored by the clergy from Tschengls/Cengles. In 1421, just 200 years later, the last of the Tschenglsberg line died.

With its recessed round apse and the flat ceiling in the nave, the St. Johann's Church is a typical Romanesque church that underwent constant structural changes as time went on. In addition to the exposed Romanesque frescoes, valuable Gothic frescoes are also on display, as are a baroque wooden ceiling and a impeccable tomb slab from the Counts of Tschengelsberg, as well as a gallery dating from the year 1600.

The two contemporary frescoes by the Mals/Malles painter Karl Plattner from 1948 are also quite significant. The roof was recently covered with traditional shingles in 2002.

The lonely grave of Hermann Müller
In the cemetery of St. Johann's Church in Prad/Prato there is the grave of honour of the German botanist Hermann Müller. Müller died suddenly on August 25, 1883 during a research trip to the Ortler region and was buried locally in Prato. The Thuringian scientist, whom Charles Darwin valued above all others, recognised in the course of his research work that flowers and animals co-evolve in response to one another. An orchid species was also named after him posthumously.