Events ON-A opened its doors at the 48H Open House Barcelona – 2021 October 24, 2021 Last Sunday, October 24, 2021, ON-A opened its doors at the 48H Open House Barcelona. The festival is held every year in Barcelona and is a special occasion to visit private and public buildings that are normally not accessible. According to the motto of the Open House BCN 2021 this year, the focus was on (...)