While it would be very instructive to know the names of those who designed and executed the Tudor buildings, it is doubtful if the facts ever will be established, and we must be content to admire without knowing to whom the credit should be given. Our appreciation is sincere, and we find unlimited interest in the remains of another industrial age. The question of authorship, however, though giving us opportunity for attribution, is not so important as the value of the buildings themselves. The problems of design and construction, the new planning, the means of decoration and equipment, such were the things which occupied the attention of our ancestors and which may now be traced and compared with subsequent architectural achievements. In Tudor times a domestic revolution was in progress. The accessories of life, possessed, if not enjoyed, by those who had gone before, were being thoroughly overhauled and were often condemned in the light of altered conditions. The barrack life of feudal and mediæval times had been changed gradually and the accommodation had become more private. Residential possibilities began to be conceived. Comforts suggested themselves and were adopted in the new houses which arose all over the country. Building became a passion with the wealthy, and with the demand for ideas there arose a supply of men desirous of devoting their lives to the building and embellishment of houses, an ambition of which the fruits may still be enjoyed to some extent. Subdivision was one of the guiding principles in the evolution of domestic architecture. Time was when the barest necessities in the way of architecture sufficed for the accommodation of the chieftains and their servants, armed or otherwise. The main requirement was solidity. Everyone then shared the fortified castles, which were surrounded in many cases by moats, and lived under the most primitive conditions. In those days apparently the only way to find solitude in a home was to get committed to the dungeons, and there were drawbacks to those retreats. Gradually more privacy was obtained by the lord and his family. The large and lofty hall, with dais and minstrel gallery, continued to dominate the plan and remained the most serviceable apartment, common to all; but smaller rooms began to be included in new buildings or additions were made to the old places. The castles, though remaining primarily as places of defence and protection from the weather, began to be used for occupation also, and new elements entered into their design and construction. The keep developed, and eventually the domestic requirements of the establishment displaced the other considerations.