Thanks to the complementary elements from "be yourself ..." range of bathroom furniture , the German manufacturer of top range vanity tops Alape allows a multitude combinations to structure the bathroom's space.
That the modules are free standing or backed by a wall on the width or length, installation is smart and simple.

Free standing and undermount bathtub. Vanity top with recessed washbasin and rim mounted fittings - DEQUE by Dornbracht