The Archaeological Survey of India (ASI) is a government agency under the Ministry of Culture that is responsible for the preservation, restoration, and maintenance of historical monuments and archaeological sites in India.

The primary objective of the ASI is to protect and conserve the cultural heritage of India by preserving and restoring historical sites and monuments.

The Ancient Monuments and Archaeological Sites and Remains Act, 1958 provides legal protection to historical monuments and sites in India by prohibiting unauthorized excavation, alteration, or destruction of these sites.

The main challenge faced by the ASI in preserving and restoring historical sites is the lack of funding. The ASI has a limited budget and often struggles to secure adequate funds for the preservation and restoration of historical sites.

The Khajuraho Temples are known for their intricate carvings and sculptures. The temples were built by the Chandela dynasty between the 9th and 11th centuries and are a UNESCO World Heritage Site.

The Ajanta Caves are known for their Buddhist rock-cut caves. The caves were built between the 2nd century BCE and the 6th century CE and are a UNESCO World Heritage Site.

The Ellora Caves are known for their Hindu and Jain rock-cut caves. The caves were built between the 6th and 11th centuries and are a UNESCO World Heritage Site.

The Taj Mahal is known for its Mughal architecture. The mausoleum was built by the Mughal emperor Shah Jahan in memory of his wife Mumtaz Mahal and is a UNESCO World Heritage Site.

The Victoria Memorial is known for its British colonial architecture. The memorial was built between 1906 and 1921 in memory of Queen Victoria and is a UNESCO World Heritage Site.

Marine Drive is known for its Art Deco architecture. The road was built between 1920 and 1930 and is a popular tourist destination in Mumbai.

St. Paul's Cathedral is known for its Gothic Revival architecture. The cathedral was built between 1839 and 1847 and is a popular tourist destination in Kolkata.

The Gateway of India is known for its Indo-Saracenic architecture. The monument was built between 1911 and 1924 to commemorate the visit of King George V and Queen Mary to India.

The Sanchi Stupa is known for its Buddhist stupa. The stupa was built in the 3rd century BCE and is a UNESCO World Heritage Site.

The Brihadeeswarar Temple is known for its Hindu temple complex. The temple was built in the 11th century and is a UNESCO World Heritage Site.

The Dilwara Temples are known for their Jain temple complex. The temples were built between the 11th and 13th centuries and are a UNESCO World Heritage Site.