Expect a straightforward, modern cathedral with bright stained glass, a relatively plain interior compared to older European churches, and excellent views from the dome if you climb the stairs. The guided tours usually last 45-90 minutes and focus on its surprisingly recent history (consecrated in 1993) and its connection to the adjacent Royal Palace. It's clean, well-lit, and rarely crowded inside, making it an easy add-on rather than a destination in itself. The experience feels more like a competent history lesson than a spiritual or architectural revelation.
Best time to visit is spring or fall when Madrid weather is pleasant for walking between sites. Expect to pay around €15-30 per person for a basic cathedral visit or dome access; guided tours that include the Royal Palace typically run €50-70. Mornings are quieter and let you avoid the worst of the tour groups.
Honest tip: combine it with the Royal Palace if you're into history - the skip-the-line combo makes sense and the locations are literally next door. Skip the audio guide if you're short on time; the live guides are generally good and you can always wander the main areas yourself afterward. Wear comfortable shoes - those stairs to the dome are steep.
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