The article is devoted to the Constitution of Brazil of 1824, the first in the history of this country. The political structure of the Brazilian Empire described in the article was based on this Constitution, which was in force from its adoption until the proclamation of the First Brazilian Republic (1889). The article analyzes the tasks that stood at the creation of the Constitution and the main changes made to the state structure of Brazil after the law was initiated. It is emphasized that, although the Imperial Constitution did not solve all the problems in Brazilian society, it was the first to identify the issues to be resolved, and that the monarchy lasted longer in Brazil than successive Republican and dictatorial regimes, including thanks to the basic law of the country in the edition of 1824.