 Complete the following phrase:  The frontage remained flood-prone, and in 1846, Governor Juan Manuel de Rosas had a contention wall six blocks long built along the paseo. Inaugurated in March 1848 as the Paseo Encarnación Ezcurra in honor of his wife, Rosas had it renamed the Paseo de Julio that October in honor of the Ninth of July, date of the 