After ascending the throne, Rainier worked assiduously to recoup Monaco's lustre, which had become tarnished through neglect (especially financial) and scandal (his mother, Princess Charlotte, took a noted jewel thief known as René the Cane as her lover). According to numerous obituaries, the Prince was faced upon his ascension with a treasury that was practically empty. The small nation's traditional gambling clientele, largely European aristocrats, found themselves with reduced funds after World War II. Other gambling centers had opened to compete with Monaco, many of them successfully. To compensate for this loss of income, Rainier decided to promote Monaco as a tax haven, commercial center, real-estate development opportunity, and international tourist attraction. The early years of his reign saw the overweening involvement of the Greek shipping tycoon Aristotle Onassis, who took control of the Société des Bains de Mer (SBM) and envisioned Monaco as solely a gambling resort. Prince Rainier regained control of SBM in 1964, effectively ensuring that his vision of Monaco would be implemented. In addition, the Societé Monégasque de Banques et de Métaux Précieux, a bank which held a significant amount of Monaco's capital, was bankrupted by its Investments in a media company in 1955, leading to the resignation of Monaco's cabinet.