In "Contrasts: or, a Parallel between the Noble Edifices of the Middle Ages, and similar Buildings of the Present Day" (1836), Pugin expressed his admiration not only for medieval art but for the whole medieval ethos, suggesting that Gothic architecture was the product of a purer society. In "The True Principles of Pointed or Christian Architecture" (1841), he set out his "two great rules of design: 1st, that there should be no features about a building which are not necessary for convenience, construction or propriety; 2nd, that all ornament should consist of enrichment of the essential construction of the building". Urging modern craftsmen to seek to emulate the style of medieval workmanship as well as reproduce its methods, Pugin sought to reinstate Gothic as the true Christian architectural style.