decorations

Q:

1. A Musjid is being constructed at the moment. The building is not yet complete and the Musjid boundaries have not yet been specified. Will it be possible to have the room beneath the staircase as non-Musjid area while the staircase leading to the first floor is Musjid? The benefit is that Azaan can be given from this room and the sound system will إن شاء الله be safe in that room. Please advise.

2. Can the qiblah wall in the Musjid be decorated? If it is not permissible, what will be regarded as decoration? Will Qur'an aayaat, ahaadeeth or duas be a form of decor? Will marble or tiles be considered a form of decor?

3. Can public funds be used for aesthetics of the Musjid? Will a dome be considered as aesthetics?

Q:

1) Are women allowed to wear niqaab with long flaps and also have decorations on it?

2) Is it permissible to get a piercings on the top part of your ear?

3) If a burqa I've been performing salaah with is only see through in the sun, will salaah be permissible and do I have to make qadha of the salaahs that were performed?

4) Is is correct for women to walk a distance to attend the weekly community ta'leem?