Can anyone tell me what kind of flower this is?

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They are in front of our house and I really like the. I mean, if even I can’t kill it – it’s one STURDY flower! I even kill mint! Anyway, I’d like to get some more and was wondering if anyone knew what kind of flower it is. They come up every spring on their own and last several months. Thanks!

**Update**  Thank you for all the suggestions!  I think I have it figured out.  It is most definitely an Asiatic Lily.  There are two types I think look the most similar.  The first is the red in this Jewel Asiatic Mixture.  The second is Nerone Asiatic Lily.  So THANK YOU for helping me figure it out!  Now I can buy some more for planting in the fall!  Sure beats the silk daffodils I have in the pot on the front porch, lol!