what year was the sagrada familia built?

still being built

I think they plan to finish it in about 20 years

I wasn't aware that it was finished yet.

Construction began in 1882 and its formal title is Temple Expiatori de la Sagrada FamÃ*lia. Originally designed by Antoni GaudÃ* (1852 – 1926), who worked on the project for over 40 years, devoting the last 15 years of his life entirely to the endeavor, the project is scheduled to be completed in 2026. On the subject of the extremely long construction period

It is still being built. Have you been there?

it is still under construction to this day