Gdansk is a beautiful city with a rich history and culture. Here's an ideal itinerary for 3 days in Gdansk:

Day 1:

• Start your day with a visit to the iconic St. Mary's Church, one of the largest brick churches in the world. The church is located in the heart of the city and offers stunning views of the city from its tower.
• After visiting the church, head to the Main Town Hall, which is a beautiful example of Gothic architecture. You can take a guided tour of the building and learn about the history of the city.
• For lunch, head to the famous Pierogi u Dzika restaurant, which serves delicious traditional Polish dumplings.
• In the afternoon, take a stroll along the Long Market, which is the main street in the city and is lined with colorful buildings and cafes. You can also visit the Neptune Fountain, which is a popular landmark in the city.
• End your day with a visit to the Amber Museum, which showcases the history and significance of amber in the region.

Day 2:

• Start your day with a visit to the Westerplatte Memorial, which is a tribute to the Polish soldiers who fought against the German invasion in 1939. The memorial is located on a peninsula and offers stunning views of the Baltic Sea.
• After visiting the memorial, head to the Oliwa Cathedral, which is a beautiful example of Baroque architecture. The cathedral is located in a peaceful park and is known for its stunning organ.
• For lunch, head to the Mandu restaurant, which serves delicious Korean cuisine.
• In the afternoon, take a boat tour of the Motlawa River, which offers stunning views of the city from the water.
• End your day with a visit to the Gdansk Shipyard, which played a significant role in the Solidarity movement that led to the fall of communism in Poland.

Day 3:

• Start your day with a visit to the European Solidarity Centre, which is a museum dedicated to the history of the Solidarity movement. The museum offers interactive exhibits and is a must-visit for anyone interested in Polish history.
• After visiting the museum, head to the Mariacka Street, which is known for its beautiful architecture and amber shops. You can also visit the Artus Court, which is a historic building that was once used for royal banquets.
• For lunch, head to the Restauracja Kubicki, which serves delicious Polish cuisine.
• In the afternoon, take a walk along the beach in Sopot, which is a popular seaside resort town located just a short train ride from Gdansk.
• End your day with a visit to the Stutthof Concentration Camp, which is located just outside of the city and offers a sobering reminder of the atrocities committed during World War II.

I hope this itinerary helps you plan your trip to Gdansk!