Antoni Gaudí was a renowned Catalan architect known for his unique and innovative architectural style. He left an indelible mark on the city of Barcelona with his imaginative and distinctive buildings. Here are seven famous Gaudí buildings in Barcelona:

1. Sagrada Família (Basilica i Temple Expiatori de la Sagrada Família): This iconic basilica is perhaps Gaudí's most famous work and remains unfinished to this day. Construction began in 1882 and continues, with an estimated completion date in the 2030s. The Sagrada Família is a UNESCO World Heritage Site and is known for its intricate facades, stunning interior, and innovative architectural concepts.

2. Park Güell: Initially conceived as a housing development project, Park Güell is now a public park filled with colorful mosaics, whimsical sculptures, and organic architectural forms. Gaudí's playful creativity is on full display here, and the park offers panoramic views of Barcelona.

3. Casa Batlló: This residential building, often referred to as the House of Bones, is renowned for its organic shapes, undulating facade, and remarkable interior design. Gaudí redesigned the building in the early 20th century, transforming it into a masterpiece of Modernisme.

4. Casa Milà (La Pedrera): Another residential building designed by Gaudí, Casa Milà is known for its wavy stone facade, unique rooftop chimneys, and innovative design elements. It is a UNESCO World Heritage Site and houses a museum showcasing Gaudí's life and work.

5. Casa Vicens: Considered one of Gaudí's earliest works, Casa Vicens showcases a blend of various architectural styles, including Moorish and Gothic influences. The building's vibrant colors and intricate detailing make it a standout in the neighborhood.

6. Palau Güell: Commissioned by Eusebi Güell, Gaudí's patron, Palau Güell is a mansion with a unique rooftop adorned with ornate chimneys and skylights. The interior features lavish decoration and innovative spatial arrangements.

7. Colònia Güell Crypt: Located just outside Barcelona, the Colònia Güell Crypt was part of a workers' community designed by Gaudí. The crypt is a precursor to Gaudí's later works, showcasing his experimentation with architectural forms and his use of materials.

These seven buildings represent only a portion of Gaudí's architectural legacy in Barcelona. Each structure is a testament to his visionary approach to design and his contribution to the development of modern architecture.