24th Marble Architectural Awards Open this year to works in Oceania, Central and South America, Africa and Australia showing an original use of natural stone. So, spotlights on the geographical areas where natural stone has found new markets. 3rd Career Award Arch. Mario Botta 2006 Career Award Arch. Hans Kollhoff 2007 Career Award   Again this year CarraraMarmotec will be paying tribute to the career and works of a leading modern architect whose projects have marked the changes and trends in taste and above all have led to a better understanding and appreciation of natural stone.