The architect Georges-Francois Blondel (1730-after 1792), son of the well-known architecture-theoretician J.F. Blondel, has always remained a somewhat shadowy figure, also because his life and career took place in several countries. In this article all the biographical information known about him so far has been compiled for the first time, largely on the basis of older literature. Initially, G.F. Blondel was educated by his father, but stayed in Rome from 1756 to 1760, where he was impressed by Piranesi; some drawings based on the latter's ‘Carceri d'invenzione’ show this influence. Back in Italy he earned his living in Paris, later in London, with making topographical prints; in the sixties he organized a number of exhibitions of his own work at the Society of Artists and the Free Society. In those days he also became involved in the building activities of Richard Grenville at the latters estate Stowe, where a few unexecuted designs are reminiscent of this, for instance of a new garden façade and a ... : Bulletin KNOB, Bulletin KNOB 107 (2008) 1 ...