Leopoldo Pollack, or Pollak, or Pollach, was an Italian architect of Viennese origins active mainly in Milan and Pavia.
A pupil of Giuseppe Piermarini, his most famous work is the Villa Belgioioso Reale of Milan, today home to the Gallery of Modern Art, with clear references to neopalladianism and French architecture, with a rustic base, a giant order of columns and finally numerous statues at the top. It has a base part with planes punctuated by Ionic fluted columns. Of great importance is the attention to the decorative apparatus, in fact the subjects of the external decorations were recommended by Parini. Pollack, in addition to creating the English garden, also designed the furniture and interiors. Pollack is also the greenhouses and stables of the castle of Belgioioso (Pavia), and the reorganization of the castle of Montecchio in Credaro (Bergamo).
He also collaborated with Piermarini on the façade project of the University of Pavia. He created the Physics Theater, called the Volta hall, and the Anatomy Theater, named after Antonio Scarpa. He built several villas in the Lombardy-Veneto territory, including Villa Amalia ad Erba, Villa Antona Traversi in Meda and Villa Casati, then Casati Stampa di Soncino in Muggiò, Palazzo Mezzabarba in Casatisma (Pavia), Villa Saporiti in Como.
From the marriage with Giustina Coffer were born seven sons, three males (Giuseppe, Cesare and Lodovico) and four females (Giuditta, Domitilla, Ester and Rachele). Only Giuseppe, the eldest, followed his father's footsteps and became an architect. The half-brother, Mihály Pollack, was a leading exponent of Neoclassicism in Hungary.