Gradually the Republic of Siena extended its sway over the neighbouring townlets and over the castelle of the contado, whose feudal lords were forced to reside in the city for some months in the year, to fight for the Commune in war. In spite of internal factions and dissensions, the city increased in wealth and prosperity; its commerce was largely extended; fugitives from Milan, flying from the Teutonic arms of Frederick Barbarossa, introduced the Art of Wool; Sienese gentlemen, led by Filippo Malavolti--a noble whom we dimly discern as a great figure in those far-off republican days--sailed to Syria in Pisan galleys and shared in the capture of Acre. Notwithstanding its traditional support of the imperial cause, it was in this century that Siena gave to the Church the "great Pope of the Lombard League"--Orlando Bandinelli, who during his long pontificate as Alexander III. (from 1159 to 1181) knew how to uphold the rights of Italy no less than the claims of the Papacy against the mightiest of the Kaisers. And, indeed, the Ghibellinism of the Sienese was always of a patriotic Italian type. In 1186 they closed their gates in the face of Barbarossa, believing that he meant to deprive them of their contado, and hurled back his son Henry discomfited from the Porta Camollia. At the close of the century, Siena began to have a Podestà as chief magistrate, like the other cities of Tuscany, who was probably at the outset an imperial nominee, and the consular government appears to have ceased by about 1212; while the people became associated into Arts or Guilds, somewhat resembling the more famous Florentine associations, whose representatives sat in the councils of the Republic and had their voice in the affairs of State.[1] Already the glorious Duomo, though needless to say not in its present form, had been consecrated by Pope Alexander, and the Dogana stood on the site of the present Palazzo Comunale, a sign of increasing commercial prosperity. A great part of the public authority was now in the hands of the Camarlingo and the four Provveditori di Biccherna, the officials who presided over the finances of the Republic. Though for a few years we still find the names of consuls, the Podestà was from 1199 onwards the chief officer of the State; we find in 1200 and in 1201 that Filippo Malavolti held this office, but after 1211 it was invariably assigned to a foreigner. In 1208 the oldest of the Sienese palaces, the Palazzo Tolomei, was built; although burned by the people on at least two occasions, it still retains not a little of its early mediaeval aspect.