 Like his father, Henry spent more time in Saxony than in other parts of Germany and the accommodation of his retinue was the Saxons' irksome duty.The Thuringians were also outraged that Henry supported Archbishop Siegfried of Mainz's claim to collect tithes from them, although most Thuringians had been exempted from the church tax for centuries.The Margrave of Lower Lusatia, Dedi I, was the first Saxon lord to rebel.