M. C. Escher?

<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpkxbnq1mslYzL5gWRn8xfgJaaqlympKWqIeAB7ZC0TTQyXZ7yIaq_9fPnrnrGS_O640c6tu3EmexbHNNoG6K9Nae0bkHA2c_oBjkzc0L7WjKd6JDJ4tV7ZbOrrB_WHkDZ4uZLKBrsUSg/s1600/DSC_0563blackandwhiteescher.jpg"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5503618240229735170" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpkxbnq1mslYzL5gWRn8xfgJaaqlympKWqIeAB7ZC0TTQyXZ7yIaq_9fPnrnrGS_O640c6tu3EmexbHNNoG6K9Nae0bkHA2c_oBjkzc0L7WjKd6JDJ4tV7ZbOrrB_WHkDZ4uZLKBrsUSg/s640/DSC_0563blackandwhiteescher.jpg" style="TEXT-ALIGN: center; MARGIN: 0px auto 10px; ; DISPLAY: block; ; CURSOR: hand" /></a><br /><div></div><span style="font-size:130%;">M. C. Escher's infinite staircase?</span><br /><p><span style="font-size:130%;"></span> </p><p><span style="font-size:130%;"> </p><br /></span><br /><div align="right"><span style="font-size:130%;">Ou l'escalier mécanique du Bon Marché?</span></div><br /><br /><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwdu2AIk_agFRG2zGVGiLAYnUV21YexwdJI-lEGZ7D6L8687pOCbJSNQsPhm6ecDZlxeEteYUXrw8oZ8Q8J0Lngc89qbS1RG1G9Ym79zGxf_7ZhCf9CnuoKrDqs3xvzeq6io88deauNi8/s1600/DSC_0563blackandwhite.jpg"><img alt="" border="0" id="BLOGGER_PHOTO_ID_5503616917853115026" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhwdu2AIk_agFRG2zGVGiLAYnUV21YexwdJI-lEGZ7D6L8687pOCbJSNQsPhm6ecDZlxeEteYUXrw8oZ8Q8J0Lngc89qbS1RG1G9Ym79zGxf_7ZhCf9CnuoKrDqs3xvzeq6io88deauNi8/s640/DSC_0563blackandwhite.jpg" style="TEXT-ALIGN: center; MARGIN: 0px auto 10px; ; DISPLAY: block; ; CURSOR: hand" /></a>

M. C. Escher?

M. C. Escher's infinite staircase? Ou l'escalier mécanique du Bon Marché?

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