Christian Doctrine, in Spanish and Tagalog
Published in Manila in 1593, this catechism in Spanish and Tagalog is the first book printed in the Philippines. It is also the first book printed in a Philippine language and the first, and only, 16th-century source showing an explicit and distinctly Philippine abecedarium (alphabet). The book is illustrated with a woodcut frontispiece of St. Dominic and initial letters in both Spanish and Tagalog. Part of the rare book collections of the Library of Congress, it is the only known copy in existence.