Complex sentence: It was built in 1974 and has undergone several reconstructions after, most notably in 2000, when the facade of the stadium was renovated and in 2008, most notable feature of the restoration was the installation of a coloured screen.
Split into simpler sentences: It was built in 1974 and has undergone several reconstructions after, most notably in 2000, when the facade of the stadium was renovated. In 2008, the most notable feature of the restoration was the installation of a coloured screen.