diff --git a/.gitignore b/.gitignore
index 397af32..6609f7c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -27,3 +27,4 @@ override.tf.json
 # Ignore CLI configuration files
 .terraformrc
 terraform.rc
+.qodo
diff --git a/README.md b/README.md
index ae35cd3..f544d7a 100644
--- a/README.md
+++ b/README.md
@@ -213,6 +213,7 @@ No modules.
 | <a name="input_dns_ttl"></a> [dns\_ttl](#input\_dns\_ttl) | The TTL of DNS recursive resolvers to cache information about this record. | `number` | `60` | no |
 | <a name="input_domain_name"></a> [domain\_name](#input\_domain\_name) | A domain name for which the certificate should be issued | `string` | `""` | no |
 | <a name="input_key_algorithm"></a> [key\_algorithm](#input\_key\_algorithm) | Specifies the algorithm of the public and private key pair that your Amazon issued certificate uses to encrypt data | `string` | `null` | no |
+| <a name="input_private_authority_arn"></a> [private\_authority\_arn](#input\_private\_authority\_arn) | Private Certificate Authority ARN for issuing private certificates | `string` | `null` | no |
 | <a name="input_putin_khuylo"></a> [putin\_khuylo](#input\_putin\_khuylo) | Do you agree that Putin doesn't respect Ukrainian sovereignty and territorial integrity? More info: https://en.wikipedia.org/wiki/Putin_khuylo! | `bool` | `true` | no |
 | <a name="input_subject_alternative_names"></a> [subject\_alternative\_names](#input\_subject\_alternative\_names) | A list of domains that should be SANs in the issued certificate | `list(string)` | `[]` | no |
 | <a name="input_tags"></a> [tags](#input\_tags) | A mapping of tags to assign to the resource | `map(string)` | `{}` | no |
diff --git a/examples/private-ca-authority/main.tf b/examples/private-ca-authority/main.tf
new file mode 100644
index 0000000..0ad4a73
--- /dev/null
+++ b/examples/private-ca-authority/main.tf
@@ -0,0 +1,106 @@
+provider "aws" {
+  region = local.region
+}
+
+data "aws_availability_zones" "available" {}
+
+locals {
+  # Use existing (via data source) or create new zone (will fail validation, if zone is not reachable)
+  use_existing_route53_zone = var.use_existing_route53_zone
+
+  domain = var.domain
+
+  # Removing trailing dot from domain - just to be sure :)
+  domain_name = trimsuffix(local.domain, ".")
+
+  zone_id = try(data.aws_route53_zone.this[0].zone_id, aws_route53_zone.this[0].zone_id)
+
+  region   = "eu-west-1"
+  name     = "ex-${basename(path.cwd)}"
+  vpc_cidr = "10.0.0.0/16"
+  azs      = slice(data.aws_availability_zones.available.names, 0, 3)
+
+  tags = {
+    Name       = local.name
+    Example    = local.name
+    Repository = "https://github.com/terraform-aws-modules/terraform-aws-acm"
+  }
+}
+
+##########################################################
+# Example Private CA
+##########################################################
+
+data "aws_route53_zone" "this" {
+  count = local.use_existing_route53_zone ? 1 : 0
+
+  name         = local.domain_name
+  private_zone = true
+}
+
+resource "aws_route53_zone" "this" {
+  count = !local.use_existing_route53_zone ? 1 : 0
+
+  name = local.domain_name
+}
+
+module "acm" {
+  source = "../../"
+
+  providers = {
+    aws.acm = aws,
+    aws.dns = aws
+  }
+
+  domain_name = local.domain_name
+  zone_id     = local.zone_id
+
+  subject_alternative_names = [
+    "*.alerts.${local.domain_name}",
+    "new.sub.${local.domain_name}",
+    "*.${local.domain_name}",
+    "alerts.${local.domain_name}",
+  ]
+
+  private_authority_arn = aws_acmpca_certificate_authority.root_ca.arn
+
+  tags = {
+    Name = local.domain_name
+  }
+}
+
+################################################################################
+# Supporting resources
+################################################################################
+
+
+
+module "vpc" {
+  source  = "terraform-aws-modules/vpc/aws"
+  version = "~> 5.0"
+
+  name = local.name
+  cidr = local.vpc_cidr
+
+  azs             = local.azs
+  private_subnets = [for k, v in local.azs : cidrsubnet(local.vpc_cidr, 4, k)]
+  public_subnets  = [for k, v in local.azs : cidrsubnet(local.vpc_cidr, 8, k + 48)]
+
+  tags = local.tags
+}
+
+resource "aws_acmpca_certificate_authority" "root_ca" {
+  type = "ROOT"
+
+  certificate_authority_configuration {
+    key_algorithm     = "RSA_4096"
+    signing_algorithm = "SHA512WITHRSA"
+    subject {
+      common_name  = "example.com"
+      organization = "org"
+    }
+  }
+
+  permanent_deletion_time_in_days = 7
+  enabled                         = true
+}
diff --git a/examples/private-ca-authority/outputs.tf b/examples/private-ca-authority/outputs.tf
new file mode 100644
index 0000000..83083be
--- /dev/null
+++ b/examples/private-ca-authority/outputs.tf
@@ -0,0 +1,34 @@
+output "acm_certificate_arn" {
+  description = "The ARN of the certificate"
+  value       = module.acm.acm_certificate_arn
+}
+
+output "acm_certificate_domain_validation_options" {
+  description = "A list of attributes to feed into other resources to complete certificate validation. Can have more than one element, e.g. if SANs are defined. Only set if DNS-validation was used."
+  value       = module.acm.acm_certificate_domain_validation_options
+}
+
+output "acm_certificate_status" {
+  description = "Status of the certificate."
+  value       = module.acm.acm_certificate_status
+}
+
+output "acm_certificate_validation_emails" {
+  description = "A list of addresses that received a validation E-Mail. Only set if EMAIL-validation was used."
+  value       = module.acm.acm_certificate_validation_emails
+}
+
+output "validation_route53_record_fqdns" {
+  description = "List of FQDNs built using the zone domain and name."
+  value       = module.acm.validation_route53_record_fqdns
+}
+
+output "distinct_domain_names" {
+  description = "List of distinct domains names used for the validation."
+  value       = module.acm.distinct_domain_names
+}
+
+output "validation_domains" {
+  description = "List of distinct domain validation options. This is useful if subject alternative names contain wildcards."
+  value       = module.acm.validation_domains
+}
diff --git a/examples/private-ca-authority/variables.tf b/examples/private-ca-authority/variables.tf
new file mode 100644
index 0000000..df5005d
--- /dev/null
+++ b/examples/private-ca-authority/variables.tf
@@ -0,0 +1,11 @@
+variable "use_existing_route53_zone" {
+  description = "Use existing (via data source) or create new zone (will fail validation, if zone is not reachable)"
+  type        = bool
+  default     = true
+}
+
+variable "domain" {
+  description = "Domain to be used for the tests"
+  type        = string
+  default     = "terraform-aws-modules.modules.tf"
+}
diff --git a/examples/private-ca-authority/versions.tf b/examples/private-ca-authority/versions.tf
new file mode 100644
index 0000000..fa875db
--- /dev/null
+++ b/examples/private-ca-authority/versions.tf
@@ -0,0 +1,10 @@
+terraform {
+  required_version = ">= 1.0"
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 4.40"
+    }
+  }
+}
diff --git a/main.tf b/main.tf
index 9c044fc..68f3f1b 100644
--- a/main.tf
+++ b/main.tf
@@ -24,6 +24,8 @@ resource "aws_acm_certificate" "this" {
   validation_method         = var.validation_method
   key_algorithm             = var.key_algorithm
 
+  certificate_authority_arn = var.private_authority_arn
+
   options {
     certificate_transparency_logging_preference = var.certificate_transparency_logging_preference ? "ENABLED" : "DISABLED"
   }
diff --git a/variables.tf b/variables.tf
index 6c0e56d..e53d33f 100644
--- a/variables.tf
+++ b/variables.tf
@@ -123,6 +123,12 @@ variable "key_algorithm" {
   default     = null
 }
 
+variable "private_authority_arn" {
+  description = "Private Certificate Authority ARN for issuing private certificates"
+  type        = string
+  default     = null
+}
+
 variable "putin_khuylo" {
   description = "Do you agree that Putin doesn't respect Ukrainian sovereignty and territorial integrity? More info: https://en.wikipedia.org/wiki/Putin_khuylo!"
   type        = bool
diff --git a/wrappers/main.tf b/wrappers/main.tf
index 688abb0..b54571f 100644
--- a/wrappers/main.tf
+++ b/wrappers/main.tf
@@ -12,6 +12,7 @@ module "wrapper" {
   dns_ttl                                     = try(each.value.dns_ttl, var.defaults.dns_ttl, 60)
   domain_name                                 = try(each.value.domain_name, var.defaults.domain_name, "")
   key_algorithm                               = try(each.value.key_algorithm, var.defaults.key_algorithm, null)
+  private_authority_arn                       = try(each.value.private_authority_arn, var.defaults.private_authority_arn, null)
   putin_khuylo                                = try(each.value.putin_khuylo, var.defaults.putin_khuylo, true)
   subject_alternative_names                   = try(each.value.subject_alternative_names, var.defaults.subject_alternative_names, [])
   tags                                        = try(each.value.tags, var.defaults.tags, {})