Complex sentence: Public art in Barcelona consists of a designated group of monuments and outdoor sculptures that adorn the city, which in conjunction with other elements such as the architecture, and network of museums, parks and gardens, provides an artistic stamp on the Catalan capital.
Split into simpler sentences: Public art in Barcelona consists of a designated group of monuments and outdoor sculptures located in Barcelona. In conjunction with other elements such as the architecture, and network of museums, parks and gardens, these works provide an artistic stamp on the Catalan capital.