The famous neo-Gothic facade has panels that symbolize the figures of Art and Science painted by José Bielman, and its top has a lacy plat band. In an Art Nouveau and Eclectic style, there is a set of bas-reliefs where the founders of the bookstore, José Lello and António Lello, are represented. 

Throughout the room can also be found the busts of some of the most important Portuguese writers, such as Eça de Queirós, Camilo Castelo Branco, Antero de Quental, Tomás Ribeiro, Guerra Junqueiro or Teófilo Braga signed by Romão Júnior. 

The interior of the building has a fascinating artistic value, such as the painted plaster ceiling that looks more like carved wood, the magnificent stained-glass window, or the elegant red staircase that gives access to the upper floor that inspired the author of the “Harry Potter” saga in the illustration of the Hogwarts stairs. However, J. K. Rowling has already gone public to say that she regrets never having visited the Lello bookstore, because she considers it very beautiful, and when she lived in Porto, she was unaware of its existence.