The main themes in Sirks’s art appear as polar opposites. On the one hand there are industrialization, engineering, shipping, construction and urban themes. On the other, there are reflection, solitude, isolation, and harmony. Sirks’s oeuvre ranges from the hustle and bustle of the waterside and the calm reflection of nature to figures, animals and the turbulence of the subconscious mind.
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- Rotterdam railway carriages c1913 11 x 11 cm.
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- Rotterdam Pschorr Concerthall 1920 23 x 39 cm.
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- Reeuwijk c 1922 32 x 44 cm.
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- Dordrecht Harbour Scene 43 x 55 cm.
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- Restaurant in Germany 1920 22 x 31 cm.
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- Rotterdam Town Hall construction 63 x 49 cm.
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- Bark vessel c 1923 34 x 22 cm.
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- Hague Outer Court Buitenhof c 1923 25 x 41 cm.
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- Concarneau pastel 1925 56 x 76 cm.
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- Rockanje dune study 1935 25 x 45 cm.
