European-style bathrooms are typical of what's often referred to as "transitional design." This simply means that they combine elements from different eras and design movements, for an eclectic—but often very effective—style mix.
The mix of old and new in European-style bathrooms can be as bold as pairing midcentury modern, Scandinavian-style cabinets with rough-hewn materials like stone or natural wood for countertops or sink pedestals.
Conversely, for a more traditional "Old World" look, you may choose to build a bright and airy space around a grand centerpiece, like a classic claw-footed porcelain tub. Pedestal sinks in matching porcelain will give any European-style bathroom a timeless, historic feel.
In terms of accessories, natural wood, wrought iron and stone are great choices for towel racks or mirror frames. They can complement any transitional design, whether its emphasis is on the more modern or the more traditional.