Seville is a beautiful city with so much to see and do. Here's an ideal itinerary for 3 days in Seville:

Day 1:

• Start your day by visiting the Real Alcázar, a stunning palace complex that was built in the 14th century. It's a UNESCO World Heritage Site and one of the most popular attractions in Seville.
• After exploring the palace, head to the nearby Cathedral of Seville, which is the largest Gothic cathedral in the world. You can climb up to the top of the Giralda tower for amazing views of the city.
• For lunch, try some traditional tapas at El Rinconcillo, one of the oldest bars in Seville.
• In the afternoon, take a stroll through the charming Santa Cruz neighborhood, which is full of narrow streets, colorful buildings, and hidden squares.
• End your day by watching a flamenco show at Casa de la Memoria or La Carbonería, two of the best places to experience this passionate dance form.

Day 2:

• Start your day by visiting the Plaza de España, a grand square that was built for the 1929 Ibero-American Exposition. It's a great place to take photos and admire the beautiful tile work.
• From there, walk to the Parque de María Luisa, a large park with fountains, gardens, and monuments. You can rent a bike or a horse-drawn carriage to explore the park.
• For lunch, head to Mercado Lonja del Barranco, a modern food market with stalls selling everything from sushi to paella.
• In the afternoon, visit the Metropol Parasol, a futuristic wooden structure that offers panoramic views of the city. You can also visit the Antiquarium museum underneath the structure to learn about the Roman ruins that were discovered during its construction.
• End your day by having dinner at El Pinton, a trendy restaurant that serves creative Andalusian cuisine.

Day 3:

• Start your day by visiting the Casa de Pilatos, a beautiful palace that combines Renaissance and Mudéjar styles. It's a quieter alternative to the Real Alcázar.
• From there, walk to the nearby Barrio Santa Cruz, another charming neighborhood with narrow streets and hidden squares. You can stop for coffee or churros at one of the many cafes in the area.
• For lunch, try some seafood at La Azotea, a popular restaurant with a rooftop terrace.
• In the afternoon, visit the Museum of Fine Arts, which has an impressive collection of Spanish art from the medieval period to the 20th century.
• End your day by having drinks at a rooftop bar like EME Catedral Hotel or Doña María Hotel, both of which offer great views of the Cathedral and the Giralda tower.

I hope this itinerary helps you plan your trip to Seville! Let me know if you have any other questions or need more recommendations.