Adolf I, Count de la Mark (German: Adolf I. Graf von der Mark und Krickenbeck) (c. 1182? – 28 June 1249), until 1226 also known as Adolf I, Count of Altena-Mark. He was son of Frederick I, Count of Berg-Altena and Alveradis of Krickenbeck, daughter of Reiner of Krieckenbeck-Millendonk.
Adolf belonged to a collateral line of the counts of Berg and was founder of the new noble branch of the Counts de la Mark.
Following the year 1226, he reunited the lands of the Counts of Berg-Altena, which had been in possession of the counts of Altena and Isenberg, the senior lines of the family ever since the division of their heritage in 1180, thereby forming the county of Mark with its capital city of Hamm. Moreover, Adolf I was reeve of the monasteries of Cappenberg and Werden.
Adolf's date of birth is unclear. Commonly accepted is the year 1194, though sometimes an earlier date has been assumed.
In his book Die Landstände der Grafschaft Mark bis zum Jahre 1510: Mit Urkundlichen Beilagen, Rudolf Schulze determined Adolf's date of birth to be in 1164. This assertion does not tie with his parents' life data.
Referring to various sources, the year 1199 is proposed by Genealogie Mittelalter.
At that time Adolf must have been born already, though; in 1198 his father Frederick had erected Burg Mark on the hill belonging to Oberhof Mark near Hamm on behalf of his son.
In fact Adolf signed as a witness a charter in 1194, and thus logic requires that he had reached majority by that time. In medieval Germany majority was bound to the ability to serve in battle or bearing arms. This was usually between 12 and 15, so that Adolf had to be born at least 12 years before signing the charter in 1194. Referring to this Adolf was born in the period between 1179 and 1182.
Another legal fact supporting this theory is that Adolf's father died either in 1198 or 1199 and he became the new Count of Altena-Mark and Krickenbeck. If he was not old enough to rule by that time his mother or a close relative would have become regent for him. But there is no sign of this in any charters of the time. Instead Adolf is signing further charters; in 1202 he names himself in another charter Adolfus puer comes de Marke. The puer comes was often translated as "young Count" but in medieval times the Latin word puer is also used for the social status known as knave or squire, or by simpler means as Knight in apprenticeship. In 1205 he signs again a charter but this time only using his legal name and title as Adolphus com. de Marka without the puer prefixed to the title. His time as squire was seemingly over. So any assumed date of birth after 1182 becomes more unlikely. Noble boys started their career at age 12, but more normally at 14 years, the same age they gained their majority. The apprenticeship lasted usually until the age of 20 or 21, before the squire was finally knighted. This fits perfectly with Adolf being puer comes... in 1202 and com. de Marka in 1205, even by means of the age, if he was born in 1182 he would have been 20 by 1202 and about 23 by 1205.