The International Secretariat of Stone Masons, also known as the International Secretariat of Stone Workers, was a global union federation bringing together trade unions representing stone masons, quarry workers and paviours.
The unions of stone masons in Austria, Germany, Norway, and Sweden, began working together in 1898. In 1903, they decided to form an international federation, which was launched at a conference in Zurich, where its headquarters were also located. In 1923, the small International Secretariat of Stone Setters joined the stone masons, and by 1925 the federation had 14 affiliates, with a total of 108,455 members, growing to 127,500 by 1935.
Throughout the federation's existence, it was led by secretary Robert Kolb. He retired on 1 January 1947, when the federation merged into the International Federation of Building and Wood Workers.
Affiliates As of 1922, the following unions were affiliated:
Union Country Affiliated membership Austria 8,500 Union of Belgian Stoneworkers Belgium 2,580 Czechoslovakia 5,700 Denmark 644 Finland 3,000 France 3,200 Central Union of Stone Workers of Germany Germany 62,189 Hungary 3,500 Italy 2,787 Netherlands 1,253 Norwegian Union of Stone Industry Workers Norway 750 Serbia ? Swedish Stone Workers' Union Sweden 3,118 Swiss Construction Workers' Union Switzerland 1,800 Uruguay 2,500 Granite Cutters' International Association United States 10,000
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