Guardian Domain

Clerics from the guardian domain, also normally called "guardians", are divine acolytes that devote themselves to become wardens and protectors not only of their temples, but also of people trasures, and ideals. They can be devotees of any type of divinity, since any temple can benefit from the dedicated protection granted by guardians, but they are more commonly found in temples of gods that have Protection or War on their portfolio.  They can often be found working as bodyguards, caravan guards, and working as guards at public events
Finally, there are guardians that are devoted to a secular organization, such as a kingdom, and train their abilities - magical or otherwise - to protect either territory, by patrolling borders and guarding fortresses; nobles, acting as royal guards and elite protectors; and relics, protecting items that have either symbolic value or magical power.

Guardian Domain Spells

• 1st--shield, sanctuary
• 3rd--arcane lock, warding bond
• 5th--counterspell, magic circle
• 7th--death ward, otiluke’s resilient sphere
• 9th--circle of power, wall of force

Bonus Proficiency

At 1st level, you gain proficiency with heavy armor.

Protect Self

At 1st level, you can now add half your Wisdom modifier (rounded down) to all Constitution and Dexterity saving throws.

Ward

At 2nd level, the guardian can turn himself into a mobile wall. As a bonus action you can spend one use of your Channel Divinity to gain the following benefits for 1 minute:

• All creatures of your choice within 5 feet gain the benefits of half cover.
• You gain resistance to one damage type of your choice.
• Whenever you or a creature within 5 feet succeeds a Dexterity saving throw, that creature takes 0 damage, instead of half.

Wholeness of Body

At 6th level, you gain the ability to heal yourself. You gain a pool of healing equal to 3 x your cleric level. As an action, you can spend any amount of points from that pool up to your maximum, and regain that amount of hit points.

Uncanny Dodge

Starting at 8th level, when an attacker that you can see hits you with an attack, you can use your reaction to halve the attack's damage against you.

Damage Reduction

Guardians are tough cookies, and they can shrug off some damage from each blow or attack. At 17th level, you gain resistance to slashing, piercing and bludgeoning damage.