Landelin was born to a noble family at Vaux near Bapaume in c. 623-625 AD, and educated in learning and piety under the care of St. Aubert, bishop of Cambrai.

Through the seduction and example of certain relations, whose flatteries unfortunately struck in with his passions, he insensibly began to walk in the broad way of the world, and from a life of pleasure and diversions, fell at length into great disorders and became a brigand.

But Landelin begged leave to retire in solitude to Laubach, now called Lobes, a desert place on the banks of the Sambre.

[2] Several persons resorting to him and imitating his manner of life, though at first they lived in separate cells, gave rise to the great abbey of Lobbes, about the year 654. when he had laid the foundation of this house, Landelin, left his disciple, St. Ursmar, to finish the building, and constituted him the first abbot.

[5] Once the number of monks had increased and the future of the community was assured Landelin resigned as abbot, in order to dedicate his life to the practice of austerities.