IS THIS SPIKE THERE TO PROTECT THE BUILDING FROM CARS

WHAT IS THIS

IS THIS SPIKE THERE TO PROTECT THE BUILDING FROM CARS [OR IS IT A MEETING SPOT FOR FOR DOGS]

I asked a few people about this spike and all but one had failed to notice it until I asked them. The one person who voiced an opinion claimed that it was modern urban art but I have learned to be cautious when a Dubliner offers an explanation. I once overheard a Dubliner explain to a tourist that Stephen's Green was named after Stephen Green who was one of the 1916 leaders.
IS THIS A MEETUP AREA FOR DOGS 001
IS THIS A MEETUP AREA FOR DOGS 001
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IS THIS A MEETUP AREA FOR DOGS 002
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IS THIS A MEETUP AREA FOR DOGS 0013
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IS THIS A MEETUP AREA FOR DOGS 004
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IS THIS A MEETUP AREA FOR DOGS 005