It's nothing new to build pavilions out of beer crates. For instance, Atelier Kempe Thill designed and built a mobile pavillion out of translucent beer crates, called the Light Building.
However, the (unknown/unnamed) designers/builders of the Pavilion Du Bonheur Provisiore in Brussels (Belgium) must have thought that here's always something more extravagant that can be done. And they designed this cathedral out of Jupiler crates. This pavilion is an extension of the exhibition about the 1958 expo, and is situated near the Atomium, and it took 19 builders a total of 3900 hours to build this.
In case you are wondering about the name of the building: "the pavilion of temporary happiness" (the official name of the pavillion) might be a joyful play on the function of the former contents of the crate - or a contemplation on the short joyous life of the pavilion, which is probably just temporary.