1918: "C.N. Barcelona" vs "C.N. Athelic" in the pool of Sabadell
Water Polo match betwen the teams of "Club Natacion Barcelona" and "Club Natacion Athletic" on June, 23rd 1918 on the occasion of the inauguaration of the pool of "C.N. Sabadell". This has been the first Water Polo match in Spain conducted into a swimming pool and not into the sea.
Source: "90 anys d' historia del Club Natacio Athletic-Barceloneta"; Juan Antonio Sierra and Manuel Domenech Bonet