There is no record of exactly when Conrad was appointed margrave. It must have been after the death of his predecessor in 1119 and before the first document naming him as ruling in Tuscany in 1120. He arrived in Tuscany with a small attachment of Germans, but he soon managed to raise an army and make a tour of his margraviate "dispensing justice" (
pro iustitia facienda). At the time, the settlement of the extensive
Cadolingi inheritance had not yet been resolved. Count Hugh, last of the Cadolingi, had died five years earlier in 1113. By his will he divided his extensive possessions, which spanned all the counties of Tuscany, with part going to his creditors and the other part to his widow, Cecilia, provided that she did not remarry. She did remarry and her four sons by Hugh disputed the inheritance with her second husband. The Tuscan communes and Bishop
Benedict I of Lucca also claimed portions. Conrad was dragged into a conflict with the latter over lands he claimed were imperial fiefs and which the bishop claimed should belong to the diocese. The Tuscan cities had taken advantage of the Investiture Controversy to increase their autonomy. Lucca and Pisa were identified strongly with the imperial cause, while Florence was identified with that of the church. The cities were also developing strong rivalries. Coastal Pisa and Genoa competed for trading monopolies, and Florence and Siena were traditional rivals in central Tuscany. In this situation, Conrad generally favoured Lucca above the rest and spent the years 1120–22 in wars with Florence. In 1120, Conrad granted a privilege to Lucca at the expense of Pisa. In this privilege,
consuls appear for the first time representing the city of Lucca. The formal recognition Conrad gave to the consuls—the title itself only appears in Lucchese records for the first time the previous year (1119)—placed the communal government that the city had been building up since the 1080s on a more solid foundation. The local aristocracy likewise aligned with the cities and for or against the empire. Conrad gave his support to the
Guidi counts, allies of Lucca, against the
Alberti counts, allies of Florence. In October 1120, with the help of the leading Guidi count,
Guido Guerra II, and the commune of Lucca, Conrad besieged the castle of Pontormo, which was being claimed as a fief by the Alberti. With Conrad's support, the Guidi also built a fortified town bordering Alberti lands by compelling the residents of the territory around the
pieve (baptismal church) of Sant'Andrea in
Empoli to move nearer the church and to construct a wall and towers there for their defence. In April 1121, Conrad was encamped around
Passignano in the
Val di Pesa, probably engaged in military action against the Alberti. He did not by this show of force secure any influence in Florence. With the resolution of the Investiture Controversy by the
Concordat of Worms (23 September 1122), the Florentine commune and the Alberti seem finally to have accepted Conrad's authority. In October 1122, Conrad presided over a
placitum, a large assembly for hearing cases and dispensing justice, outside Florence. This is possibly the last
placitum held by a Tuscan margrave. On 24 October, a provost and canon of the Florentine church appeared before the tribunal. The priests charged one Bonifacio di Tegrimo with having unlawfully occupied a parcel of land. Conrad found in their favour. Since this occurred within the limits of the Florentine
contado (county) and during the episcopate of the Alberti bishop
Goffredo, it is likely that the Florentines had made their peace with the margrave after more than three years of warfare with Conrad and his predecessor. This apparent détente does not seem to have affected the Guidi, who nevertheless remained on good terms with Conrad. By 1123 certain
cattani (captains) loyal to the Guidi had occupied the
rocca (hilltop castle) of
Fiesole overlooking Florence. While Count Guido and Conrad were absent from Tuscany (1123/4), the Florentines attacked Fiesole and besieged it. The siege dragged on for three years before the Fiesolans were starved into submission and their Etruscan walls razed to the ground (1125/6). Guido died in 1124, probably before ever returning to Tuscany. Conrad apparently made no move to defend Fiesole. In the late 1120s, Conrad supported Genoa in its war with Pisa, and he tried to cultivate an alliance with Florence in order to draw them away from their support for Pisa. It is in this context that, in 1127, he granted Bishop Goffredo the right to be provided lodging (
albergaria) in the parish (
plebatus) comprising Campoli, Decimo and Bossolo. Conrad also took the side of Lucca in the city's economic war with Pisa, and in 1128 he sided with the Siena against Pisa, and assisted the Sienese to capture the castle of
Bolgheri from the Pisan noble family of the
Gherardeschi. The last record of Conrad's rule dates to 1129, but there is no record of his death nor of a successor in Tuscany prior to 1131. In that year the margrave of Tuscany was one
Rampret (Rempotto). Conrad issued more private diplomas than any other 12th-century margrave of Tuscany. In later sources he is sometimes confused with King
Conrad II of Italy (died 1101). ==Imperial agent in Italy==