Churches and cathedrals — hidden gems

In Marrakech, in the Guéliz district, the church of Saints-Martyrs holds a mosaic altar bearing the Arabic inscription "Allah Mahabba".

In Barracas, the 1876 neo-Gothic church for Felicitas Guerrero, with túneles from 1893 and the Templo Escondido: tours only at month's end.

In Takanawa, the temple where the 47 ronin of Ako are buried beside their lord. Incense, stone and a 1703 act of revenge.

The Basilique Notre-Dame d'Heliopolis in Cairo: a Byzantine dome, Baron Empain's crypt and the Art Nouveau boulevards of the district he founded.

In Stockholm, Engelbrekt Church: a masterpiece of Swedish National Romanticism on a rock in Östermalm, with a 32-metre nave.

In NoMad, behind a garden, the Church of the Transfiguration: English Gothic from 1849, a lych-gate, and the story of New York's actors.

Genko-an, a Zen temple in the northern hills of Kyoto: two philosophical windows, a ceiling made from the blood of samurai, and almost no visitors.

In Chom Thong, far from crowded wats, Rama III built a Sino-Thai temple with carved doors and silent halls. Zero tour buses.

On the Prinsengracht a façade so sober it disappears among the houses: inside, a monumental hall and a great Smits organ.