Shen (神) character painted over a seal The same 神 character is painted over a seal on 2 different artworks:


An early landscape painting (by Wei Xian/卫贤?):

 
A calligraphy by Wang Xizhi: 




Painting over a seal seems rather rare to me. I guess this one is the seal from a collector, but I might be wrong. Do you know a particular reason why it has been painted? And does it have a special meaning (maybe a religious one)? 

Edit: here's an attempt to make the seal readable:
well, the emperor 乾隆 was a collector, he used four characters "神", "妙", "能" &amp; "逸" to categorise artworks (calligraphy, or painting).

and then, he used his seal to chop on the artwork :(