 In February 1952, Elizabeth II came to the throne and decided to make Windsor her principal weekend retreat. The private apartments which had not been properly occupied since the era of Queen Mary were renovated and further modernised, and the Queen, Prince Philip and their two children took up residence. By the early 1990s, however, there had been a marked deterioration in the quality of the Upper Ward, in particular the State Apartments. Generations of repairs and replacements had resulted in a "diminution of the richness with which they had first been decorated", a "gradual attrition of the original vibrancy of effect, as each change repeated a more faded version of the last". A programme of repair work to replace the heating and the wiring of the Upper Ward began in 1988. Work was also undertaken to underpin the motte of the Round Tower after fresh subsidence was detected in 1988, threatening the collapse of the tower.
