As a Chicago resident and Architecture fan, I love these three... as a fan of build techniques, man - 21000 and 21001 are some of the worst sets I've put together. : r/lego
Lego Architecture Willis Tower 21000 3D model | CGTrader
LEGO® Architecture Set wählen 21000 21002 21003 21004 21009 bis 21047 Neu & OVP | eBay
Amazon.co.jp: LEGO Architecture Willis Tower 21000 : Toys & Games