Lambert Mieszkowic was a Polish prince member of the House of Piast.

He was the fourth son of Mieszko I of Poland

Mieszko I of Poland

Mieszko I , was a Duke of the Polans from about 960 until his death. A member of the Piast dynasty, he was son of Siemomysł; grandchild of Lestek; father of Bolesław I the Brave, the first crowned King of Poland; likely father of Świętosława , a Nordic Queen; and grandfather of her son, Cnut the...

 but the third born from his second marriage with Oda, daughter of Dietrich of Haldensleben

Dietrich of Haldensleben

Dietrich of Haldensleben was the first margrave of the Northern March from 965 until his deposition in 983...

, Margrave of the North March.

Life

Nothing is known about his first years of life. Lambert's first appearance was in the document called "Dagome iudex

Dagome iudex

"Dagome iudex" is one of the earliest historical documents relating to Poland. Poland is not mentioned by name, but reference is made to Dagome and Ote and their sons in 991, placing their land under the protection of the Apostolic See...

" (ca. 991–92), alongside with his parents and brother Mieszko

Mieszko Mieszkowic

Mieszko Mieszkowic , was a Polish prince member of the House of Piast.He was the second son of Mieszko I of Poland but the eldest born from his second marriage with Oda, daughter of Dietrich of Haldensleben, Margrave of the North March.-Life:Nothing is knew about his first years of life...

. After Mieszko I's death (25 May 992) began the war between Bolesław I and his half-brothers for the paternal heritage, who, according to some historians lasted only a few weeks, and by others, only finished in 995. Despite the tensions between both parties, Bolesław I's first son with Emnilda of Lusatia was probably named after him; it's expected that the choice of this name for his son was an expression of warming relations between Bolesław I and his stepmother Oda.

At the end, Bolesław I took control over all the country and expelled his stepmother and half-brothers from Poland

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

 to Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

. Lambert's further fate is unknown; previously he was identified with Lambert, Bishop of Kraków (d. 1030), but now this identification is contested.

In 1032 certain Dytryk (son of either Lambert or his brother Mieszko) returned of Poland and took control over part of the country after the fall of Mieszko II Lambert

Mieszko II Lambert

Mieszko II Lambert was King of Poland during 1025–1031, and Duke from 1032 until his death.He was the second son of Bolesław I the Brave, but the eldest born from his third wife Emmilda, daughter of Dobromir, possible ruler of Lusatia. He was probably named after his paternal grandfather, Mieszko I...

, but his reign was short-lived: in 1033 he was deposed and expelled by Mieszko II, who reunited all Poland under his hands.