Along with his early biographers and a few surviving documents, Dante, or Durante, Alighieri himself is the source of much biographical data about his noble ancestry and its origins and about the circumstances of his own birth and its date, which fell under the constellation of Gemini, 1265, in Florence; this biographical fact and many of those which follow are given, in particular, in passages in The Divine Comedy, in La vita nuova, and in Il Convivio. He was the great-great-grandson of Cacciaguida, who was born at the end of the 11th century, within the "ancient boundaries" of Florence, was knighted by Conrad III, and died in the Second Crusade of 1147. In the Paradiso Dante traced his as far back as the legendary Roman origins of his city. His was a family of ancient urban nobility. His kin were not wealthy country landowners, although they did possess a few modest properties in the immediate outskirts of Florence. They were active instead in the economic life of the Florentine commune, or community - which was founded on trade and industry. Bellincione, Dante's grandfather, was a moneylender in Florence and in nearby Prato. Alighiero di Bellincione d'Alighiero, Dante's father, continued Bellincione's practice until the time of his death, which occurred before 1283. Dante hardly ever mentions these close relatives in his works; he may not have been proud of their activities.