Riemannian most often refers to Bernhard Riemann:
- Riemannian geometry
- Riemannian manifold
- Riemannian circle
- Riemannian submersion
- Riemannian Penrose inequality
- Riemannian holonomy
- Riemann curvature tensor
- Riemannian connection
- Riemannian symmetric space
- Riemannian volume form
- Riemannian bundle metric
- List of topics named after Bernhard Riemann
but may also refer to Hugo Riemann:
- Neo-Riemannian theory (music)