Luigi Pietro Manini, Count of Fagagna (Crema, Lombardy-Venetia, 8 March 1848 – Brescia, 29 June 1936) was an Italian set designer, architect, painter. He arrived in Lisbon, Portugal in 1879, where he lived until he returned to Italy in 1913. Manini was responsible for some of the most striking architectural designs in Portugal; some of his most famous works include: Palácio Hotel do Buçaco; Quinta da Regaleira; Jardim da Regaleira with its inverse initiating well; Vila Relógio; Vila Sassetti; Challet Mayer; The gardener's house at Challet Biester.