FONTANA ARTE Table lamp, model no. 2218, 1960s Brass, painted brass, coloured opaque glass. 29 cm (11 3/8 in) high, 24.5 cm (9 5/8 in) diameter Manufactured by Fontana Arte, Italy.
The golden ratio should not need any introduction to those who have studied math and design in school. Some designers apply these mathematical concepts to come up with more visually appealing works. This infographic from companyfolders.com covers a few golden ratio facts: