2 SURVEY MOTIVATIONS AND OBJECTIVES  
2.1 The role of large scale mass assembly on galaxy evolution  
2.2 Measuring the environmental effects beyond r200  
2.3 Relating star formation quenching to ram-pressure stripping  
2.4 The approach of the Shapley Supercluster Survey  

3 THE TARGET: SHAPLEY SUPERCLUSTER  

4 SHASS: THE DATA  

5 VST DATA REDUCTION  

6 ANALYSIS OF THE OPTICAL IMAGES  

7 RESULTS  
7.1 Galaxy density  
7.2 Weak lensing mass distribution of A 3558  

8 SUMMARY AND CONCLUSIONS