**The St. Petersburg Grand Mosque** is both an architectural landmark and a significant spiritual site — once the main mosque of the Russian Empire. Built in the **Northern Art Nouveau style**, it remains one of the largest mosques in the European part of Russia. 🏛️

What to know before visiting:

* **Free entry** for people of all faiths

* **Modest dress required**; women must cover their heads with a scarf

* Women may enter **only the second floor**, where the designated prayer hall is located

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This is a rare opportunity to experience **cultural heritage and religious tradition** in one of St. Petersburg’s most iconic buildings. ✔️