| Konrad IX the Black | |
| Duke of Oleśnica, Koźle | |
| Noble Family: | Silesian Piasts of Oleśnica |
| Father: | Konrad V Kantner |
| Mother: | Margareta |
| Spouse: | Margareta of Rawa |
| Issue: | Barbara of Oleśnica |
| Birth Date: | c. 1415 |
| Death Date: | 14 August 1471 |
Konrad IX the Black (Polish: Konrad IX Czarny) (c. 1415 – 14 August 1471) was a duke of Oleśnica, Koźle, half of Bytom and half of Ścinawa since 1450 (with his brothers as co-rulers), and since 1452 sole ruler over Oleśnica, Koźle and half of Bytom.
He was the eldest son of Konrad V Kantner, Duke of Oleśnica by his wife Margareta.
After his father's death in 1439 Konrad IX and his younger brother Konrad X were excluded from the government by their uncle Konrad VII the White, who reigned until 1450, when was deposed by both Konrad IX and Konrad X, who co-ruled for the next two years, until 1452, when was made the division of the Duchy. Konrad IX obtain Oleśnica, Koźle and half of Bytom.
During the wars between Bohemia and Hungary, he initially supported King George of Poděbrady and paid homage to him with his brother Konrad X in 1459 in exchange for the confirmation of the possession of their father's Duchy; however, when the Hungarian troops entered in Silesia, Konrad IX and Konrad X repudied his alliance with Bohemia and paid homage to King Matthias Corvinus.
In 1459 Konrad IX buy the half of the Duchy of Bytom who belonged to the Cieszyn branch[1] by the amount of 1,700 fines. Thanks to this, he could reunificated the whole Duchy of Bytom after almost 104 years.
By 1453 Konrad IX married with Margareta (b. 1441 – d. by 1 September 1485), daughter of Duke Siemowit V of Rawa. They had one daughter:
On his death, Konrad IX was succeeded by his brother in all his lands except Oleśnica and Bierutów, who were leave to his wife Margareta as her dower.
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