The proper way to hang a Mezuzah is on the right doorpost, when entering a room.
It should be placed at the bottom of the top third of the doorpost height.
It should be at a slight angle (about 15 degrees) facing inwards, towards the room.
It should be installed using nails, screws, adhesive or other permanent installation method.
As soon as they can reach it. Children can even be lifted up to touch it.
When Jewish people walk through a door with a mezuzah, they typically touch or kiss the mezuzah as a sign of respect and acknowledgment of the commandments. They may also recite a brief prayer or blessing, expressing their connection to God and the spiritual significance of the mitzvah. The mezuzah itself, containing a scroll with biblical verses, serves as a reminder of faith and the importance of God’s presence in their home.
For Jews, the Mezuzah is a symbol and reminder of our Jewish faith and what it stands for. By touching or kissing the mezuzah, one is acknowledging their love of G d and commitment to his commandments, as specified in the Mezuzah.
When passing a mezuzah, Jews are traditionally encouraged to touch it with their hand or an object, and then kiss their fingers as a sign of respect and remembrance of God's commandments. This practice serves as a reminder of their faith and commitment to Jewish teachings and values. The mezuzah, which contains verses from the Torah, is affixed to the doorposts of Jewish homes and symbolizes the sanctity of the household.
There are two parts of the Mezuzah, The Mezuzah Scroll itself and the Mezuzah Case. The Mezuzah Scroll is made with ink on parchment of a Kosher animal. The case can be made of almost any material as its purpose is to protect the scroll. Most common materials for the mezuzah case are metal, stone, wood and glass.
There is no limit to the size of a Mezuzah. Attached is a video of the largest known mezuzah recently installed at Ben Gurion Airport.
The scroll inside the mezuzah is written in Hebrew.
The origin of the mezuzah is from the "Shema" in which is mentioned the core beliefs of Judaism and its teachings. Therefore, the "purpose" of the mezuzah is as a reminder, when entering and leaving the home, of the mezuzah's message. The mezuzah contains a parchment inscribed with a passage from the Torah (from Deuteronomy ch.6 and ch.11), placed on Jewish doorposts.
The Mezuzah was not "found". The Mezuzah is a Jewish ritual object whose origin is from the Torah, which dates back to 1313 BCE. I guess you could say it was found then.
We don't kiss the wall, we kiss the mezuzah. Or rather, we touch it and then kiss the finger that touched it. The mezuzah is a reminder of God's presence. It contains a parchment with verses (from Deuteronomy ch.6 and ch.11) proclaiming the God is One and reminding us to keep the Torah.
A Mezuzah case, is the protective and/or decorative case used to cover the Mezuzah Scroll. The Mezuzah scroll is a small parchment scroll that contains biblical passages, which is then place on the door post of homes according to Jewish Tradition. I'll attached a link of some cases so you can see what they look like.
The significance of the mezuzah is all in the mezuzah scroll itself and therefore, when you hang a visible mezuzah scroll, there is no need for any symbolism. However, when you hang a mezuzah scroll in a protective case through which the scroll is not visible, it should have a letter "shin" (looks like this "\|/" ) on the front to indicate that there is mezuzah scroll inside and it is not just a nice case. The Shin is the first letter of the biblical paragraph written within the scroll as well as the name of g d Sha-dai. Having said that, there are many who choose to have various judaic symbols depicted on their mezuzah cases such as the Jewish star, hamsa, tree of life or other as shown in the attached link.