The present 62-metre-long bridge dates to 1857 , requiring only seven months for construction , from the date the older bridge was closed to traffic , and was designed on three 17.2 m arches by Paul-Martin Gallocher de Lagalisserie and Paul Vaudrey . It was the site of many of the killings of protesters by the police , in the Paris massacre of 1961 , and a commemoration plaque on the bridge was unveiled by the mayor of Paris in 2001
Paris massacre of 1961
Paris massacre of 1961
Pont Saint-Michel