Six petals symbol framed by a Hexagram

San Martín Church, Izco, Navarre, Spain

CC Picture by rlasaosa/Flickr 

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About the meaning of the six petals symbol see
zeevgoldmann.blogspot.com/search?q=six

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Six petal symbols framed by a Hexagram 

drawings of the Flower of Life by Leonardo da Vinci's 15 century C.E

CC picture from Vikipedia entry Flower of Life