The Eixample quarter is a district in Barcelona, Spain. It is known for its grid-like street layout, which was designed by the architect Ildefons Cerdà in the late 19th century. The Eixample is characterized by its wide, tree-lined avenues and modernist architecture, including buildings designed by famous architects such as Antoni Gaudí. It is a vibrant and cosmopolitan area, with a mix of residential, commercial, and cultural establishments. The Eixample is home to many of Barcelona's famous landmarks, including the Sagrada Família and Casa Batlló.