Here are some of his notable writings:
* "Historia de Cataluña" (History of Catalonia): This multi-volume work is considered his magnum opus and a fundamental reference for Catalan history.
* "Los Condes de Barcelona" (The Counts of Barcelona): This work delves into the history of the Counts of Barcelona, who played a crucial role in the development of Catalonia.
* "Origen de la Casa Real de Barcelona" (Origin of the Royal House of Barcelona): This book explores the origins of the Catalan royal lineage.
* "Diplomatari de Catalunya" (Diplomatic of Catalonia): This is a collection of important historical documents related to Catalonia.
Bofarull y Broca also wrote numerous articles and essays on Catalan history, focusing on its institutions, culture, and society. He was a staunch defender of Catalan identity and played an important role in the development of Catalan historiography.