Final answer:
American Protestants began viewing Catholicism more favorably in the 1960s after the Pope announced a need to revise certain ritual practices during the Second Vatican Council.
Step-by-step explanation:
In the 1960s, American Protestants began looking more favorably at Catholicism after the announcement of the church's plans to update some of its ritual practices. This gathering was called the Second Vatican Council. The Council of Trent, on the other hand, took place in the 16th century and was a response to Martin Luther's challenge to the Catholic Church.
The gathering that prompted American Protestants to begin looking more favorably on Catholicism in the 1960s due to the Pope announcing an update to some ritual practices is named the Second Vatican Council. This council, distinct from the Council of Trent of the 16th century, sought to address modernization and renew the Church's approach to its beliefs and practices in a changing world. Unlike the Council of Trent, which dealt with the Protestant Reformation, the Second Vatican Council aimed to foster ecumenism and to update Catholicism to be more in touch with contemporary society.