The Pocitos district, near the beach of the same name, has many homes built by Bello and Reboratti between 1920 and 1940, with a mixture of styles. Other landmarks in Pocitos are the "Edificio Panamericano" designed by Raul Sichero, and the "Positano" and "El Pilar" designed by Adolfo Sommer Smith and Luis García Pardo in the 1950s and 1960s. However, the construction boom of the 1970s and 1980s transformed the face of this neighbourhood, with a cluster of modern apartment buildings for upper and upper middle class residents.[citation needed]

What district has many homes built by Bello and reboratti?