The LEGO Architecture Landmark Series started in 2008 and consists primarily of models that represent the world's most famous structures. Initially the sets were focused on major cities in the United States such as models of the Sears Tower, John Hancock Center, the Empire State Building, and the Seattle Space Needle followed by international landmarks including Burj Khalifa, Brandenburg Gate, the Sydney Opera House and dozens more. Within the subtheme the scale of the sets differ widely.
Landmark Series was introduced in 2008 and currently consists of 33 sets. As of today,
21021 Marina Bay Sands is the most valuable Landmark Series set with an estimated new/factory sealed value of $1,000.
Summary
Architecture Landmark Series The Leaning Tower of Pisa set 21015 was released in June 2013, retailing for $35, but has since been retired. New, unopened The Leaning Tower of Pisa sets are valued at $172, while used sets can be found for $50.
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