Sanctum (city-state)

Sanctum is a self-governed sanctuary within a radiation shield dome on the Alpha Moon. It was built to be a sanctuary for human race since Earth was becoming uninhabitable. The radiation shield protects Sanctum Citizens from intruders, dangerous lifeforms, adverse atmospheric conditions and celestial events, such as temporal flares on the moon. Sanctum was built by the first four families of astronomers, scientists, doctors and mechanics on Eligius III's Mission Team Alpha from Earth. These families, also known as the Primes, became the royal leaders of Sanctum. Sanctum is a safe, peaceful community, rich in traditions.

History
In 2045, the Eligius Corporation set out on a space mission to look for oil from other planets since Earth was running out of oil. Mission Team Alpha was sent to explore life on the moon Alpha. To prepare them for fatal radiation, the astronomers were turned into Nightbloods using Becca Franco's serum. They also used Becca's cybernetic implant technology known as the Memory Drives in order to keep log of their findings. Upon arriving on the moon, the atmosphere turned out to be survivable without Nightblood. They established a settlement to serve as their mission base. Josephine Lightbourne suggested calling the place "Sanctum" because it was safe and peaceful. The team brought with them a thousand embryos genetically-engineered with Nightblood to protect against solar radiation. The embryos were later used alongside the descendants of the team to create the settlement.

However, while the radiation was survivable, the moon was filled with other dangers such as enemies, hostile lifeforms, poisonous plants and atmospheric conditions such as temporal flares. To protect their settlement from these dangers, the astronomers used Becca's technology to build a radiation shield dome around their settlement. The shield has been critical in stopping bugs under eclipse-induced psychosis from entering the settlement. The region within the shield became Sanctum. Under the "divine" royal leadership of the Primes - the original four families - Sanctum has been a peaceful and safe place. Eventually, Gabriel Santiago rebelled and destroyed the remaining embryos in an attempt to avoid more resurrections, but Josephine Prime instated oblation to get rid of anyone who wasn't a potential host and was thus diluting the bloodline.

Sanctum lived without Earth contact until two centuries later when Clarke's group arrived seeking for shelter following Earth's third apocalyptic disaster. Following their arrival, a conflict broke out that led to the deaths of most of the Primes and the overthrow of their rule.

Naming Day Ceremony
One of Sanctum's biggest traditions is Naming Day during which a person with Royal Blood (Nightblood) takes on the name of a Prime. Children born with royal blood are known as "hosts" and are protected until they reach a mature age to undergo this holy naming ceremony. For example, when Delilah becomes of age, Sanctum holds a naming ceremony for her, after which she becomes Priya VII.

The ceremony begins with parties and celebrations. This is followed by a repentance stage during which the people of Sanctum make amends with fellow Sanctum citizens. They then write their sins and float them away in lanterns. Once the repentance ceremony is over, the host is called to the stage for their official naming ritual. The host is asked to enter into a secret room. When the host comes back out later, they have not only the name but also the memories and personalities of the Prime they were being named after. They officially become a Prime, marking the end of their Naming Day Ceremony.

To the rest of Sanctum citizens, the Naming Day is a holy ceremony honoring the Primes. However, the reality is that the Primes have been manipulating them in order to bring their loved ones back to life, using the Royal Bloods as hosts. Each Prime has a Mind Drive which stores all their consciousness including memories and personalities. When a Prime dies, their consciousness is kept in the Mind Drive until there is an available host with royal blood. During the Naming Ceremony, the Primes use the Mind Drives to transfer the previously dead Prime's consciousness into the new host. In so-doing, the Prime comes back to life, using the host's body.

Death and Burial
When a Prime dies, the other Primes take out the Prime's Mind Drive from the host's body. They store it until there is another available Royal Blood to serve as a host for the Prime.

The funeral for Sanctum Citizens is considered to be a holy ritual during which the dead are offered to the woods.

Primes
🇨🇴 🇨🇴
 * Russell Lightbourne
 * Simone Lightbourne
 * Miranda Mason
 * Caleb Mason
 * Jasmine Mason
 * Victor Lee
 * Faye Lee
 * Daniel Lee
 * Kaylee Lee
 * Josephine Lightbourne
 * Ryker Desai
 * Priya Desai

Other Sanctum Citizens
🇨🇴 🇨🇴
 * Blythe Ann Workman
 * Jae Workman
 * Delilah Workman
 * Rose
 * Jade
 * Cassius
 * Sierra
 * Josiah
 * Tory
 * Zev
 * Trey
 * Picasso

Wonkru
🇨🇴 🇨🇴
 * Clarke Griffin
 * Bellamy Blake
 * Octavia Blake
 * Raven Reyes
 * John Murphy
 * Echo
 * Emori
 * Nathan Miller
 * Eric Jackson
 * Abigail Griffin
 * Jordan Green
 * Madi Griffin
 * Gaia
 * Indra
 * Niylah
 * James Crockett

Exiled Citizens
🇨🇴 🇨🇴
 * Charmaine Diyoza

Palace
The Palace is where Sanctum's ruling royal family lived. It was formerly occupied by the Lightbourne family of Russell, Simone and their daughter, Josephine Lightbourne.

Outer Fields/Greenhouses
The Outer fields surround the town. Greenhouses are located in these grass plains. The outer fields are used for growing crops and harvesting.

The Gagarin was landed in one of the outer fields until "Memento Mori".

Bar / Lounge
This is the common hangout place in Sanctum that also has a bar for beverages. It seems to be a discussion place for Wonkru.

Machine Shop
The Machine Shop is a mechanical room where motorcycles are repaired. This is where mechanics like Raven and Ryker spent most of their time. The reactor powering Sanctum is located beneath the machine shop.

Notes and Trivia

 * Sanctum is the Latin root of "sanctuary" which means safe, peaceful.
 * There are flags with the infinity symbol on it hanging around the place.
 * Sanctum is built apon a large hill/mountain.