Why did the Irish build the Brooklyn bridge?

The Irish did not specifically build the Brooklyn Bridge; rather, it was designed by John A. Roebling, a German-born engineer. However, many Irish immigrants worked on its construction in the late 19th century, contributing significantly to the labor force. The bridge was built to connect Manhattan and Brooklyn, facilitating transportation and commerce as New York City was rapidly growing. The involvement of Irish laborers in such projects reflected their crucial role in the infrastructure development of the United States during that era.