Marcelino Menéndez y Pelayo (Spanish pronunciation: [maɾθeˈlino meˈnendeθ i peˈlaʝo]; 3 November 1856 – 19 May 1912) was a Spanish scholar, historian and literary critic. Even though his main interest was the history of ideas, and Hispanic philology in general, he also cultivated poetry, translation and philosophy.
He was born at Santander where he showed that he was an infant prodigy. At only 15, he studied under Manuel Milà i Fontanals at the University of Barcelona (1871–1872), then proceeded to the central University of Madrid. His academic success was unprecedented; a special law was passed by the Cortes to enable him to become a professor at 22. Three years later, he was elected a member of the Real Academia Española; but he was already well-known throughout Spain.
His first volume, Estudios críticos sobre escritores montañeses (1876), had attracted little notice, and his scholarly Horacio en Español (1877) appealed only to students. He became famous, through his Ciencia española (1878), a collection of polemical essays defending the national tradition against the attacks of political and religious reformers. The unbending orthodoxy of this work is even more noticeable in the Historia de los heterodoxos españoles (1880–1886), and the writer was hailed as the champion of the Ultramontane party. As the Catholic Encyclopedia (1908–10) described his work, "Every page of his writings reveals a wealth of strong common sense, clear perception, and a vein of wonderful and ever varying erudition. Thoroughly Catholic in spirit, he found his greatest delight, he declared, in devoting all his work to the glory of God and the exaltation of the name of Jesus."