What am I? Poem riddle

1. I am old and I am huge

2. I also am "beginning"

3. While someone, let me call him scrooge, just cheaply is producing

4. To get line one, the key gets split into more than one word

5. Line two includes Pope Gregory, whose system is preferred.

6. Finally line three will be the word in proper meaning. The other two are similar, but only when you’re reading

7. One last tip, it may help you, Line two is not in english. The country where it’s spoken in, was many years distinguished

I know the rhymes are not worth an oscar, but after 45 minutes, this is the best I came up with

PS: Line one refers to complete words, splitting a letter from it is not part of the clue

Hint 1:

Hint 2:

Hint 3:

Hint 4:

Hint 5:

Hint 6: