St. Sebastian Chapel dates back to a vow made around 400 years ago, when the plague reached Tiers. At that time, the village was under the administration of the Lords of Völsegg. Fearing that the Black Death might reach his castle, the lord vowed to build a chapel dedicated to Saint Sebastian if his family were spared.
Today, the chapel stands as a silent reminder of that era. It can only be viewed from the outside, as the interior is not accessible.