Giancarlo Mattioli (1933–2018) was an Italian architect, designer and urban planner associated with the radical transformation of Italian design culture during the late 1960s. Born in Bologna, he studied architecture in Florence and founded the Gruppo Architetti Urbanisti Città Nuova in 1961, together with Pierluigi Cervellati, Umberto Maccaferri, Franco Morelli, Gianpaolo Mazzucato and Mario Zaffagnini. Mattioli gained international recognition through the Nesso lamp for Artemide, designed with Città Nuova after winning the Studio Artemide Domus competition in 1965. The project explored new ways of conceiving the lamp as a luminous object, using a concealed bulb to create subdued environmental light. Produced from 1967, Nesso became one of the defining works of Italian post-war lighting and is held in the permanent collection of MoMA New York.

Alongside his work for Artemide, Mattioli also designed lighting for Sirrah, including the MT lamp of 1969. These works show the same concern for screened, indirect light: the bulb is not presented as a visible technical element, but absorbed into a larger spatial structure. This approach is closely connected to Mattioli's background as an architect and urban planner. From the late 1960s onwards, he worked on several historic urban plans for the city of Bologna, including the historic centre, hillside, industrial district, master plan and railway junction. His lighting therefore reads less as isolated product design than as part of a broader architectural intelligence, where form, atmosphere and environment are considered together.