Some facts include:
We come there to worship God. An atmosphere of decorum, cleanliness and contemplation is to be maintained. The payers are set forth in the traditional Siddur (prayerbook).
first synagogue was built in 1371-1387
Some synagogues do, but some don't.
Yes, ALL Orthodox synagogues do, but in the other synagogues, some non-Orthodox Jews will wear their own.
Some Christians think churches, mosques, and synagogues are all the same thing, but they're not: 1. Churches are churches 2. Synagogues are synagogues 3. Mosques are mosques All 3 are called "places of worship".
Some of them do.
They do have windows, whenever feasible. Some synagogues, historically, had no windows to disguise the purpose of the building during times of religious persecution.
There is no specific "the stair" in a synagogues. Some synagogues have stairs while others don't.
In an Orthodox (and some Conservative) synagogues women must cover their shoulders any time they are in a synagogue. In Reform (and some Conservative) synagogues, it doesn't matter.
The fate of synagogues and Jewish business's depended greatly on what part of Europe they were in. Some were left untouched by the war while others were burned down or even bombed.
Some of them do.
Yes. Some synagogues have their own kitchens.
Some do, and some do not. No decoration is required by Jewish law or custom. Those synagogues that do choose to decorate, will use Jewish symbols such as a depiction of the two tablets of the Ten Commandments, or a menorah-candelabrum.