Paris accessibility hit or miss, so here's real situation at major spots across arrondissements:

Good: Louvre has excellent elevator access via Pyramide entrance and wheelchair loans. Musée d'Orsay near Solférino fully accessible. Most Métro Line 1 and 14 stations have elevator access (check RATP app). Newer areas like La Défense completely accessible.

Challenging: Sacré-Cœur requires funicular or very long ramp around Montmartre. Marais cobblestones around Place des Vosges brutal. Many cafés in Latin Quarter have steps but staff usually help with portable ramps.

Avoid: Eiffel Tower stairs obviously, but elevators work well from Trocadéro side. Latin Quarter has too many steps around Sorbonne and narrow sidewalks.

Restaurant bathrooms often downstairs with no elevator around République and Saint-Germain. Always call ahead. Parisians generally helpful once they understand what you need, especially in Marais area.