area, then he travelled across the Simplon Pass to Genoa and thence – always on foot – along the Riviera to Nice, Marseilles, and Montpellier where he stayed until late November, everywhere socialising with local entomologists. After a visit at home he travelled to Paris in January 1853 to perfect his French and to learn Italian and English. At Easter 1853 he took up his studies in Berlin again and collected intensively – mainly Sesiidae – together with Kalisch, Ribbe and the Kricheldorff brothers. In March 1854 he received his Dr. phil. degree for the thesis "De Sesiis agro Berolinensis". From April to October 1854 Staudinger collected in Sardinia with the intention to discover the larvae of Papilio hospiton in which he succeeded after many failures. In 1855 he collected in the Alps (Carinthia, Glockner area). In April 1856 he started on a voyage to Iceland together with C. Kalisch. On his return in the autumn of 1856 he became engaged to entomologist Grabow's daughter and married her on 21 January 1857. The same night the couple departed and travelled via Paris, Lyon, Marseilles – where they stopped and learned Spanish within ten days – Barcelona, Valencia and Almería to Málaga, where they stayed for a month. Then they spent nine months in Granada (living in the Alhambra) where Staudinger collected extensively and where their daughter was born on 2 November. In December they went via Málaga to Chiclana near Cadiz, spent the first half of 1858 there and finally returned to Berlin in July. Because of the costs of his travels Staudinger founded a business and, with the help of his father-in-law, began to sell parts of his collections. Over the years this grew into a substantial and successful naturalist business with worldwide connections. In 1859 the Staudinger family moved to Dresden where his son Paul was born the same year. In Dresden Staudinger built the Diana-Bad (Diana Baths) in 1864, a large facility with bath tubs, steam baths, and Irish-Roman baths which Staudinger loved since this type of bath had helped him when he had a bad cold on a journey. When his city dwelling became too small in 1874 he moved to the "Villa Diana" in Blasewitz near Dresden. In 1879 the Danish-born entomologist Andreas Bang-Haas (1846–1925) entered into the business, married Staudinger's daughter in 1880 and became co-owner of the firm, now "Staudinger & Bang-Haas", in