The Patriarchal Cathedral of St. Alexander Nevsky in Sofia, Bulgaria, is a major tourist landmark, easily accessible by public transport and generally open year-round with no significant seasonal restrictions, though hours may vary for services. Visitors can explore independently, but guided tours offer valuable historical context. Entry to the main cathedral is typically free, with small fees often applied for photography permits or access to the crypt museum (around 6-10 BGN). A typical visit lasts between 30 minutes to 1.5 hours, allowing time to admire its impressive architecture, mosaics, and frescoes. It's advisable to dress respectfully (shoulders and knees covered), especially during services, and maintain quiet inside this active place of worship.