Before the term "courtesan" came into repute, prostitutes were even in Italy commonly called "sinners," _peccatrice_. The change, Graf remarks in a very interesting study of the Renaissance prostitute ("Una Cortigiana fra Mille," _Attraverso il Cinquecento_, pp. 217-351), "reveals a profound alteration in ideas and in life;" a term that suggested infamy gave place to one that suggested approval, and even honor, for the courts of the Renaissance period represented the finest culture of the time. The best of these courtesans seem to have been not altogether unworthy of the honor they received. We can detect this in their letters. There is a chapter on the letters of Renaissance prostitutes, especially those of Camilla de Pisa which are marked by genuine passion, in Lothar Schmidt's _Frauenbriefe der Renaissance_. The famous Imperia, called by a Pope in the early years of the sixteenth century "nobilissimum Romæ scortum," knew Latin and could write Italian verse. Other courtesans knew Italian and Latin poetry by heart, while they were accomplished in music, dancing, and speech. We are reminded of ancient Greece, and Graf, discussing how far the Renaissance courtesans resembled the hetairæ, finds a very considerable likeness, especially in culture and influence, though with some differences due to the antagonism between religion and prostitution at the later period. The most distinguished figure in every respect among the courtesans of that time was certainly Tullia D'Aragona. She was probably the daughter of Cardinal D'Aragona (an illegitimate scion of the Spanish royal family) by a Ferrarese courtesan who became his mistress. Tullia has gained a high reputation by her verse. Her best sonnet is addressed to a youth of twenty, whom she passionately loved, but who did not return her love. Her _Guerrino Meschino_, a translation from the Spanish, is a very pure and chaste work. She was a woman of refined instincts and aspirations, and once at least she abandoned her life of prostitution. She was held in high esteem and respect. When, in 1546, Cosimo, Duke of Florence, ordered all prostitutes to wear a yellow veil or handkerchief as a public badge of their profession, Tullia appealed to the Duchess, a Spanish lady of high character, and received permission to dispense with this badge on account of her "rara scienzia di poesia et filosofia." She dedicated her _Rime_ to the Duchess. Tullia D'Aragona was very beautiful, with yellow hair, and remarkably large and bright eyes, which dominated those who came near her. She was of proud bearing and inspired unusual respect (G. Biagi, "Un' Etera Romana," _Nuova Antologia_, vol. iv, 1886, pp. 655-711; S. Bongi, _Rivista critica della Letteratura Italiana_, 1886, IV, p. 186).