Konrad IX the Black
Konrad IX the Black( 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.
Charles I of Hungary
Charles I, also known as Charles Robert (128816 July 1342) was King of Hungary and Croatia from 1308 to his death.
He was a member of the Capetian House of Anjou and the only son of Charles Martel, Prince of Salerno.
His father was the eldest son of Charles II of Naples and Mary of Hungary.
She laid claim to Hungary after her brother, Ladislaus IV of Hungary, died in 1290, but the Hungarian prelates and lords elected her cousin, Andrew III, king.
Instead of abandoning her claim to Hungary, she transferred it to her son, Charles Martel, and after his death in 1295, to her grandson, Charles.
On the other hand, her husband, Charles II of Naples, made their third son, Robert, heir to the Kingdom of Naples, thus disinheriting Charles.
Charles came to the Kingdom of Hungary upon the invitation of an influential Croatian lord, Paul Šubić, in August 1300.
Andrew III died on 14 January 1301, and within four months Charles was crowned king, but with a provisional crown instead of the Holy Crown of Hungary.
Most Hungarian noblemen refused to yield to him and elected Wenceslaus of Bohemia king.
Charles withdrew to the southern regions of the kingdom.
Pope Boniface VIII acknowledged Charles as the lawful king in 1303, but Charles was unable to strengthen his position against his opponent.
Wenceslaus abdicated in favor of Otto of Bavaria in 1305.
Because it had no central government, the Kingdom of Hungary had disintegrated into a dozen provinces, each headed by a powerful nobleman, or oligarch.
One of those oligarchs, Ladislaus III Kán, captured and imprisoned Otto of Bavaria in 1307.
Charles was elected king in Pest on 27 November 1308, but his rule remained nominal in most parts of his kingdom even after he was crowned with the Holy Crown on 27 August 1310.
Charles won his first decisive victory in the Battle of Rozgony (at present-day Rozhanovce in Slovakia) on 15 June 1312.
After that his troops seized most fortresses of the powerful Aba family.
During the next decade, Charles restored royal power primarily with the assistance of the prelates and lesser noblemen in most regions of the kingdom.
After the death of the most powerful oligarch, Matthew Csák, in 1321, Charles became the undisputed ruler of the whole kingdom, with the exception of Croatia where local noblemen were able to preserve their autonomous status.
He was not able to hinder the development of Wallachia into an independent principality after his defeat in the Battle of Posada in 1330.
Charles's contemporaries described his defeat in that battle as a punishment from God for his cruel revenge against the family of Felician Záh who had attempted to slaughter the royal family.
Charles rarely made perpetual land grants, instead introducing a system of "office fiefs", whereby his officials enjoyed significant revenues, but only for the time they held a royal office, which ensured their loyalty.
In the second half of his reign, Charles did not hold Diets and administered his kingdom with absolute power.
He established the Order of Saint George, which was the first secular order of knights.
He promoted the opening of new gold mines, which made Hungary the largest producer of gold in Europe.
The first Hungarian gold coins were minted during his reign.
At the congress of Visegrád in 1335, he mediated a reconciliation between two neighboring monarchs, John of Bohemia and Casimir III of Poland.
Treaties signed at the same congress also contributed to the development of new commercial routes linking Hungary with Western Europe.
Charles's efforts to reunite Hungary, together with his administrative and economic reforms, established the basis for the achievements of his successor, Louis the Great.
Bolesław of Bytom
Bolesław of Bytom( 1330 –) was a duke of Koźle from 1347 and Duke of Bytom since 1352 until his death.
He was the second son of Duke Władysław of Bytom but the eldest by his second wife Ludgarda, daughter of Henry II the Lion, Prince of Mecklenburg and Lord of Stargard.
Casimir of Bytom
Casimir of Bytom( 1253/57 – 10 March 1312) was a Duke of Opole during 1282– 1284( with his brother as co-ruler) and Duke of Bytom from 1284 until his death.
He was the second son of Władysław, Duke of Opole – Racibórz, by his wife Euphemia, daughter of Władysław Odonic, Duke of Greater Poland.
George of Bytom
George of Bytom( b. 1300- d. by 1327), was a Duke of Bytom since 1316 until his death( as co-ruler of his brother).
He was the fourth son of Duke Casimir of Bytom by his wife Helena.
Maria of Bytom
Maria of Bytom (before 1295 – Temesvár (Timişoara), Kingdom of Hungary, 15 December 1317), was a Queen of Hungary by marriage to Charles I of Hungary.
She was the third child and only daughter of Duke Casimir of Bytom by his wife Helena, whose origins are unknown, although the later historiography tends to recognize her as a daughter of Lev I of Galicia, from the Rurikid dynasty.
Maria was the first or second wife of Charles
I Robert of Anjou, King of Hungary.
This union was childless, but older literature claimed that they had two daughters.
Little is known about the activities of Mary as Queen of Hungary.
Her marriage to Charles
I Robert consolidated the Polish-Hungarian agreement directed against the Kingdom of Bohemia, and also helped to establish a close Polish-Hungarian relations in the 14th century, reflected in the ecclesiastical career in Hungary of Maria's brothers, Bolesław and Mieszko, and the later third marriage of Charles I Robert with Elizabeth of Kujavia.
Siemowit of Bytom
Siemowit of Bytom(( 1292 – aft. 1 July 1342), was a Duke of Bytom during 1312 – 1316 and Duke of Gliwice from 1340 until his death.
He was the third son of Duke Casimir of Bytom by his wife Helena.
Maria of Brabant, Duchess of Bavaria
Maria of Brabant( 1226–1256) was a daughter of Henry II, Duke of Brabant, and Maria of Swabia.
She married Louis II, Duke of Bavaria, being the first of three wives.
Mieszko of Bytom
Mieszko of Bytom( b. ca. 1305 – d. bef. 9 August 1344), was a Duke of Siewierz during 1312 – 1328( from 1315 only formally), Bishop of Nitra during 1328 – 1334 and Bishop of Veszprém since 1334 until his death.
He was the fifth and youngest son of Duke Casimir of Bytom by his wife Helena.
Władysław of Bytom
Władysław of Bytom( 1277 /83 – around 8 September 1352), was a Duke of Koźle during 1303- 1334, Duke of Bytom from 1316, Duke of Toszek since 1329 and Duke of Siewierz during 1328 – 1337.
He was the second son of Duke Casimir of Bytom by his wife Helena.

Question: Where did Maria Of Bytom's husband die?