Which Grand Cru is identified as not a monopole?

Richebourg is identified as not being a monopole because it is a Grand Cru vineyard in Burgundy that is owned by multiple producers rather than a single entity. A monopole refers to a vineyard site that is solely owned and operated by one producer, allowing for a unique representation of that vineyard's terroir. For example, Romanée-Conti and La Tâche are both considered monopoles as they are exclusively owned by the Domaine de la Romanée-Conti, resulting in a distinct and singular expression of those vineyards through its wines. While Chambertin is also not a monopole, the presence of multiple owners in Richebourg is what specifically highlights its classification as a non-monopole Grand Cru in contrast to the others listed. Therefore, Richebourg serves as a critical example of the diverse ownership structures within Burgundy's esteemed Grand Cru vineyards.