locked up in Wartburg castle; however, he escaped one year later and continued the war against his father together with Diezmann. During this time, in 1284, their uncle Theodoric of Landsberg died, and four years later, in 1288, Henry the Illustrious, Albert's father, also died. These deaths heightened the family disputes. At the death of his father, Albert became Margrave of Meissen, while his nephew Frederick Tuta - son of Theodoric of Landsberg - inherited the Margraviate of Lusatia, which was sold off by Albert's son Diezmann in 1303. Shortly after, Frederick captured his father Albert in battle. By the Treaty of Rochlitz (1 January 1289), Albert obtained his freedom after the renunciation of large parts of his lands. He retained Meissen for himself, but later sold it to Frederick Tuta. When, after his death (1291) his cousins Frederick and Diezmann arbitrarily took possession of his lands, Albert - suffering financial difficulties - was compelled to sell Thuringia in 1293 to the German King Adolf of Nassau; in the contract, it was stipulated that the king could take possession of the lands after Albert's death. In the sale, Albert included Meissen and Osterland as his fiefs, despite the fact they were in the hands of his sons. Thanks to this, Adolf's successor Albert I of Habsburg was able to take possession of these lands, claiming that the contract of sale was legitimate and lawful. Kunigunde of Eisenberg died on 31 October 1286. Four years later, on 1 October 1290, Albert married thirdly Elisabeth of Orlamünde, heiress of Nordhalben and widow of Hartmann XI of Lobdeburg-Arnshaugk. The same year, Apitz, Albert's son by Kunigunde, was formally legitimized by the Emperor and created Herr of Tenneberg. He wished to make Apitz his successor in Thuringia, but the plan was resisted by his two elder sons. On 11 April 1291 Apitz's younger full-sister, Elisabeth, married Henry III of Frankenstein; the marriage was short-lived and childless. Elisabeth died on 28 September 1293. Three years later (9 October 1296), Apitz married a sister of his brother-in-law Henry III, apparently also called Elisabeth. This marriage, like his sister's, was childless. Four years later (24 August 1300) Albert's eldest surviving son, Frederick, married Elisabeth of Lobdeburg-Arnshaugk, daughter of his stepmother; this caused the final reconciliation between father and son. Five years later (27 June 1305) Apitz of Tenneberg died, aged thirty-five. The death of his favorite son