Peruvian literature is rooted in the oral traditions of pre-Columbian civilizations. Spaniards introduced writing in the 16th century; colonial literary expression included chronicles and religious literature. After independence, Costumbrism and Romanticism became the most common literary genres, as exemplified in the works of Ricardo Palma. The early 20th century's ''Indigenismo'' movement was led by such writers as Ciro Alegría and José María Arguedas. César Vallejo wrote modernist and often politically engaged verse. Modern Peruvian literature is recognized thanks to authors such as Nobel laureate Mario Vargas Llosa, a leading member of the Latin American Boom.''Ceviche'' is a popular lime marinated seafood dish which originated in Peru.