He studied at the Fine Art Academy in Genoa, where he exhibited his paintings at exhibitions of Firenze da Rovezzano. The following regularly participates in the exhibitions of the Society Promotrici di Academia in Florence and Genoa. by A. are about 35 with "G. Agostini " sign. and partly dat. According to (oil on cardboard, wood or slate, sometimes oval) on the art market and in Priv.-Collections with Late romantically landscapes and Vedute from Tuscany (Val d'elsa, Valdarno, Chianti, Maremma) with individual homesteads or forts (Castello di Verruca, 1874) and city Views (Firenze Veduta da Monte Massy, 1881, oval; Certaldo Livorno Poppi), but also from Liguria and Ital. Cities such as Venice and Rome (Veduta di Castel S. Angelo). He found further motifs on his travels to Corsica, Switzerland and through the Alps (the Matterhorn, 1886).

Literature: Benezit "Dict. d. Peintres etc.", Paris, 1999; Vlaamischd School, AKL1, 1992 (Teilreprint des Bd I, 1983, s.v. Agostino, Guido). E. Mayer, Annuaire internat. des ventes, P. 1974; Art price index internat. '94, I, Boston 1993; – Christie's (auction.), Sale On 18.1.1974, No. 214 und on 8.8.1974, No. 365; On 18.4.2000; sale on 20.6.2002, No. 87; sale on 21.6.2002, No.132; Pittori & pittura dell'Ottocento ital., VI: Diz. degli artisti, Novara 1997; VIII: Quotazioni del mercato, 1999 (10 Gem.). – Online: Datenbank Ares, Genua (2002). – Mitt. Dorotheum, Vienna (6 paintings). Inscription: signed and dated 1882, lower left. Technique: oil on cardboard, painted in oval. Luxuriousy original period gold-plated frame. Measurements: unframed w 8 3/4" x h 10 1/3" ( 22,2 x 26,4 cm), framed w 13" x h 14 3/4" (33 x 37,5 cm) Condition: in very good condition.