V Encuentro de Bolillos y Nacional de Patchwork Alcañiz (Teruel, Aragon)
Sponsor:   Amas de Casa Ercávica de la capital bajoaragonesa
Date: Sunday, March 9, 2014
Time:  10:00 to 13:30
Place: el Recinto Ferial de Alcañiz
Website: http://tinyurl.com/l7937uf

This event is past and I wasn’t able to find anything about it beforehand. But now there is a good writeup of the activities, and over 500 participants attended. I believe this event is held every two years.