The Old City of Zamość is a UNESCO World Heritage Site located in southeastern Poland. The city was founded in the late 16th century by Jan Zamoyski, a Polish nobleman and statesman. The city was designed by Italian architect Bernardo Morando and is known for its unique Renaissance and Baroque architectural style.

The Old City of Zamość is often referred to as a "Pearl of the Renaissance" due to its stunning architecture and layout. The city's layout is based on a perfect square with ten streets running north-south and ten streets running east-west, intersecting at the main square, which is surrounded by elegant buildings and palaces.

The city's most notable landmarks include the Town Hall, the Zamoyski Palace, and the Cathedral of the Resurrection. The Town Hall, built in the mid-17th century, features a Renaissance-style façade and a clock tower that offers stunning views of the city. The Zamoyski Palace, located on the eastern side of the main square, was built in the early 17th century and features a Baroque-style façade. The Cathedral of the Resurrection, located on the southern side of the main square, was built in the late 16th century and features an ornate Baroque interior.

The Old City of Zamość is also known for its defensive walls and fortifications, which were built to protect the city from invasion. The walls and fortifications are well-preserved and can still be seen today.