After visiting with my wheelchair-using partner, here's honest breakdown of major attractions across Paris arrondissements:

Excellent: Louvre (elevators, ramps, accessible bathrooms via Pyramide entrance), Musée d'Orsay near Solférino (full access), Arc de Triomphe (elevator to top), most modern Métro stations on Lines 1 and 14.

Challenging: Sacré-Cœur (steep Montmartre hill, some steps), Eiffel Tower (elevator access but long waits from Trocadéro), older Métro stations around République (many lack elevators).

Avoid: Notre Dame interior (stairs), Sainte-Chapelle (narrow spiral staircase), Latin Quarter cobblestone streets around Sorbonne.

Métro accessibility: Lines 1 and 14 fully accessible. Check RATP website for station-by-station accessibility maps. Many stations have platform gaps requiring assistance around Châtelet-Les Halles.

Paris improving but still challenging compared to London. Plan extra time and alternative routes between République and Saint-Germain.