Is Porphyrin Planar?

I have been looking at this diagram from quite some time, I know the 18 pi electron cycle that forms porphin(e) is definitely planar but what about the whole molecule?... The Nitrogen's act as a polydentate ligand with a metal complex so that may be a reason that the whole molecule may not be planar..
Can someone elaborate?


[![Porphyrin1](https://i.stack.imgur.com/xKe4g.png)](https://i.stack.imgur.com/xKe4g.png)
[![Porphyrin2](https://i.stack.imgur.com/ipvrK.png)](https://i.stack.imgur.com/ipvrK.png)
[![Porphyrin4](https://i.stack.imgur.com/I9EWe.png)](https://i.stack.imgur.com/I9EWe.png)


