The number of seats of each council was determined by the population count, according to the 1877 Municipal Law.
As Barcelona had more than 200,000 inhabitants, the number of seats composing the city council was 50.
The municipal law also established that half of the seats had to be renewed every two years.
Voting was on the basis of universal manhood suffrage, which comprised all national males over twenty-five, having at least a two-year residency in a municipality and in full enjoyment of their civil rights.
[2] The Municipal Law allowed the King of Spain to elect directly the Mayor of Barcelona.