The essential parts of the house date from the Tufa Period. Alterations were made from time to time in the course of the two centuries during which it was occupied, but they were not so extensive as to obscure the original plan. The most obvious changes were those affecting the wall decoration. [Illustration: Fig. 146.--Plan of the house of the Silver Wedding. _a._ Fauces. _d._ Tetrastyle atrium. _n._ Dining room. _o._ Tablinum. _p._ Andron. _r._ Peristyle. _s._ Kitchen. _t-v._ Bath. (_v._ Apodyterium. _u._ Tepidarium. _t._ Caldarium.) _w._ Summer dining room. _x_, _z_. Sleeping rooms. _y._ Exedra. 1. Open-air swimming tank, in a small garden (2). 3. Corridor leading to another house and to a side street. 4. Oecus. 6. Garden, partially excavated. 7. Open-air triclinium. α-ι. Fauces, atrium, and other rooms of separate dwelling connected with the larger house.] In the small rooms at the right of the atrium are traces of the decoration of the first style, which was in vogue when the house was built. Toward the end of the Republic almost the whole interior was redecorated in the second style, but without paintings. Brilliant blocks and panels dating from this renovation may still be seen upon the upper part of the walls of the atrium and on those of the oecus, the exedra, the two bedrooms next to the exedra, and the front part of the long apodyterium. Afterwards a few rooms were done over in the third style, of which scanty remains are found. Lastly, after the fourth style had come into vogue, but before 60 A.D.--as shown by an inscription on a column of the peristyle--a large part of the house was redecorated in the fourth style, including the tablinum, the andron and the room at the right (_q_), the peristyle, the long dining room (_w_), and the inner portion of the apodyterium. The lower part of the walls of the atrium were also painted over, but with designs and coloring that harmonized well with the decoration of the second style above. In this house the history of Pompeian wall decoration can be followed from the century after the Second Punic War to the middle of the first century of our era, from the time of Cato the Elder to that of Claudius and Nero. There are few paintings, however, and they are not of special interest.