Today the Proclamation of Republic completes its 135th anniversary in Brazil. Despite the term "proclamation", military officers carried out a coup d'etat.
Since then, so many administrations have been plagued by instability, revolts, and much more. Brazil had a president who governed by a state of exception for almost uninterrupted 5 years (Artur Bernardes).
Pedro II was extremely popular, even among authorities, intellectuals, and scientists abroad. In 1876, he inaugurated a fair with then-U.S. president Ulysses Grant.