Istanbul is a city with a rich history and there are many historical places to visit while in the city. Some of the top historical places to visit in Istanbul include:

The Hagia Sophia: This is a former cathedral and mosque that is now a museum. It is renowned for its beautiful architecture and intricate mosaics, and is considered one of the most important buildings in the world.

The Topkapi Palace: This is a large palace that was once the primary residence of the Ottoman sultans. It is now a museum and is home to an impressive collection of art, jewelry, and other artifacts.

The Blue Mosque: This is an iconic mosque with beautiful blue tiles and six minarets. It is a popular tourist attraction and is still used as a place of worship today.

The Galata Tower: This tower offers panoramic views of the city and is a popular tourist attraction. It is also home to a cafe and restaurant.

The Basilica Cistern: This is an underground cistern that was used to store water in ancient times. It is now a popular tourist attraction and is known for its eerie atmosphere and beautiful columns.

The Istanbul Archaeological Museums: This museum complex is home to a large collection of artifacts and exhibits that showcase the city's long history.