The goal was to achieve a `` balance '' between preserving the rock art and making a vital part of Spain 's heritage accessible , the director of the Altamira Museum , JosÃ© Antonio Lasheras , told CNN . ` ` Sistine Chapel of paleolithic art '' reopens to small visitors . Effect of sunlight on city 's humidity , yet to be measured . Site discovered by amateur archaeologist and his daughter in 1879 .
` ` Sistine Chapel of paleolithic art '' reopens to small visitors . Effect of sunlight on city 's humidity , yet to be measured . Site discovered by amateur archaeologist and his daughter in 1879 .