main door/door

[99bottles]

What should I call a door like the one between the two lions below?

1. He reached the main door of the mansion.

2. He reached the entrance of the mansion.

3. He reached the front door of the mansion.

4. He reached the door of the mansion.

#4 was my first choice.

 

[The Newt]

There's nothing wrong with any of those choices, although "front door" is probably the most natural.

 

[Hermione Golightly]

I'd call that an 'entrance'.

 

[LVRBC]

I haven't heard the term "main door" before but it is understandable. All the other choices seem fine.