Complex sentence: As part of the major redevelopment in 1999 and 2000, a significant number of new striking architectural and aesthetic features were added, including a three story atrium at the eastern end of the complex in the fashion mall.
Split into simpler sentences: As part of the major redevelopment in 1999 and 2000, a significant number of new striking architectural and aesthetic features were added. Of note was a three story atrium at the eastern end of the complex in the fashion mall.