The Dancing EggL'Ou com Balla

L'Ou com Balla ("the Dancing Egg") is a curious Corpus Christi tradition observed in churches across Barcelona and Catalonia. On Corpus Day (60 days after Easter), an egg dried and sealed is placed on top of the water jets in church fountains, causing it to spin as if dancing 1 2. This spectacle – with fountains tinted and decorated with flowers – is repeated in many cloisters and town squares (e.g. Barcelona Cathedral, Casa de l’Ardiaca) between Corpus Thursday and the following weekend 1 3. It symbolizes the Eucharist and the miracle of new life during the church's feast.

Unique to Catalonia (and a few nearby regions), the ritual has medieval roots. It is tied to the Catholic feast of Corpus Christi but also echoes older spring fertility customs. In Barcelona the tradition dates reliably to 1637, when it began at the Cathedral’s cloister 1. Over time it spread to other churches and public fountains throughout the late 20th century, becoming a colorful and idiosyncratic Catholic folk celebration.