While most people in India practice Hinduism, Islam is the second-largest religion, making up 13.4% of the population. Visiting the old temples and mosques, palaces and forts, you'll see the intersection of these two ancient cultures reflected in the architecture. This fascinating mash-up of styles and symbols is known as Indo-Islamic architecture.
The key event happened around 800 years ago. That's when Delhi came under Muslim rule for the first time. Then in the early 16th century the Mughals took over and mixed things up even more, combining elements from Islamic, Persian, Ottoman Turkish and Indian architectural styles.