Barcelona’s slave trade history revealed on new walking tour In Barcelona, May 26th, 2016 Tagged , Barcelona, barcelona holidays, catalonia holidays, city breaks, history, short breaks, slave trade, Tourism, travel, walking holidays Barcelona’s slave trade history revealed on new walking tour We love anything touristy that isn’t touristy! This new walking tour of places with a slave history in Barcelona is definitely not your typical route! We can’t wait to try it out!! Tours can be booked via Memòria Barcelona. Photo by Memòria Barcelona.