Francesco Rugeri, also known as Ruger, Rugier, Rugeri, Ruggeri, Ruggieri, Ruggerius, was the first of an important family of luthiers, the Casa Rugeri in Cremona, Italy. His instruments are masterfully constructed. His violins are inspired by Nicolò Amati's "Grand Amati" pattern. Francesco was the first to develop a smaller cello design, which has become the standard for modern cello dimensions. Today, Rugeri's instruments are nearly as renowned as Nicolò Amati's instruments.