Is monopoly a differentiated or a homogeneous?

A monopoly is characterized by a single seller dominating the market for a unique product or service, making it a homogeneous market in the sense that there are no close substitutes available. However, the product offered by the monopolist may have differentiated features compared to potential alternatives, but since no other firm can provide the same product, it is primarily considered homogeneous. Thus, while the monopolistic product might have unique attributes, the market structure itself is defined by the absence of competition, aligning it more closely with homogeneity.