diff --git a/lib/Succession/Schema.pm b/lib/Succession/Schema.pm
new file mode 100644
index 0000000..09a45b3
--- /dev/null
+++ b/lib/Succession/Schema.pm
@@ -0,0 +1,38 @@
+use utf8;
+package Succession::Schema;
+
+# Created by DBIx::Class::Schema::Loader
+# DO NOT MODIFY THE FIRST PART OF THIS FILE
+
+use Moose;
+use MooseX::MarkAsMethods autoclean => 1;
+extends 'DBIx::Class::Schema';
+
+__PACKAGE__->load_namespaces;
+
+
+# Created by DBIx::Class::Schema::Loader v0.07045 @ 2016-12-04 17:40:32
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:cqEWNsPVtEZ+VfMbuLt1MQ
+
+
+# You can replace this text with custom code or comments, and it will be preserved on regeneration
+
+sub get_schema {
+  my @errors;
+  foreach (qw[SUCC_DB_HOST SUCC_DB_NAME SUCC_DB_USER SUCC_DB_PASS]) {
+    push @errors, $_ unless defined $ENV{$_};
+  }
+
+  if (@errors) {
+    die 'Please set the following environment variables: ',
+        join(', ', @errors), "\n";
+  }
+
+  return __PACKAGE__->connect(
+    "dbi:mysql:host=$ENV{SUCC_DB_HOST};database=$ENV{SUCC_DB_NAME}",
+    $ENV{SUCC_DB_USER}, $ENV{SUCC_DB_PASS},
+  );
+}
+
+__PACKAGE__->meta->make_immutable(inline_constructor => 0);
+1;
diff --git a/lib/Succession/Schema/Result/Person.pm b/lib/Succession/Schema/Result/Person.pm
new file mode 100644
index 0000000..6ec780a
--- /dev/null
+++ b/lib/Succession/Schema/Result/Person.pm
@@ -0,0 +1,211 @@
+use utf8;
+package Succession::Schema::Result::Person;
+
+# Created by DBIx::Class::Schema::Loader
+# DO NOT MODIFY THE FIRST PART OF THIS FILE
+
+=head1 NAME
+
+Succession::Schema::Result::Person
+
+=cut
+
+use strict;
+use warnings;
+
+use Moose;
+use MooseX::NonMoose;
+use MooseX::MarkAsMethods autoclean => 1;
+extends 'DBIx::Class::Core';
+
+=head1 COMPONENTS LOADED
+
+=over 4
+
+=item * L<DBIx::Class::InflateColumn::DateTime>
+
+=back
+
+=cut
+
+__PACKAGE__->load_components("InflateColumn::DateTime");
+
+=head1 TABLE: C<person>
+
+=cut
+
+__PACKAGE__->table("person");
+
+=head1 ACCESSORS
+
+=head2 id
+
+  data_type: 'integer'
+  is_auto_increment: 1
+  is_nullable: 0
+
+=head2 name
+
+  data_type: 'varchar'
+  is_nullable: 0
+  size: 50
+
+=head2 born
+
+  data_type: 'date'
+  datetime_undef_if_invalid: 1
+  is_nullable: 0
+
+=head2 died
+
+  data_type: 'date'
+  datetime_undef_if_invalid: 1
+  is_nullable: 1
+
+=head2 parent
+
+  data_type: 'integer'
+  is_foreign_key: 1
+  is_nullable: 1
+
+=head2 family_order
+
+  data_type: 'integer'
+  is_nullable: 1
+
+=cut
+
+__PACKAGE__->add_columns(
+  "id",
+  { data_type => "integer", is_auto_increment => 1, is_nullable => 0 },
+  "name",
+  { data_type => "varchar", is_nullable => 0, size => 50 },
+  "born",
+  { data_type => "date", datetime_undef_if_invalid => 1, is_nullable => 0 },
+  "died",
+  { data_type => "date", datetime_undef_if_invalid => 1, is_nullable => 1 },
+  "parent",
+  { data_type => "integer", is_foreign_key => 1, is_nullable => 1 },
+  "family_order",
+  { data_type => "integer", is_nullable => 1 },
+);
+
+=head1 PRIMARY KEY
+
+=over 4
+
+=item * L</id>
+
+=back
+
+=cut
+
+__PACKAGE__->set_primary_key("id");
+
+=head1 RELATIONS
+
+=head2 parent
+
+Type: belongs_to
+
+Related object: L<Succession::Schema::Result::Person>
+
+=cut
+
+__PACKAGE__->belongs_to(
+  "parent",
+  "Succession::Schema::Result::Person",
+  { id => "parent" },
+  {
+    is_deferrable => 1,
+    join_type     => "LEFT",
+    on_delete     => "RESTRICT",
+    on_update     => "RESTRICT",
+  },
+);
+
+=head2 people
+
+Type: has_many
+
+Related object: L<Succession::Schema::Result::Person>
+
+=cut
+
+__PACKAGE__->has_many(
+  "people",
+  "Succession::Schema::Result::Person",
+  { "foreign.parent" => "self.id" },
+  { cascade_copy => 0, cascade_delete => 0 },
+);
+
+=head2 sovereigns
+
+Type: has_many
+
+Related object: L<Succession::Schema::Result::Sovereign>
+
+=cut
+
+__PACKAGE__->has_many(
+  "sovereigns",
+  "Succession::Schema::Result::Sovereign",
+  { "foreign.person_id" => "self.id" },
+  { cascade_copy => 0, cascade_delete => 0 },
+);
+
+
+# Created by DBIx::Class::Schema::Loader v0.07045 @ 2016-12-04 17:40:32
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:6h03yIJpwjWvQGw1B+Es6Q
+
+
+# You can replace this text with custom code or comments, and it will be preserved on regeneration
+
+sub succession_on_date {
+  my $self = shift;
+  my ($date) = @_;
+
+  my @desc = map {
+    $_, $_->descendants_on_date($date)
+  } $self->descendants_on_date($date);
+
+  push @desc, $self->younger_siblings_and_descendants_on_date($date);
+
+  return @desc;
+}
+
+sub younger_siblings_and_descendants_on_date {
+  my $self = shift;
+  my ($date) = @_;
+
+  my $parent = $self->parent;
+  return unless $self->parent;
+
+  my @younger_siblings = $parent->descendants_on_date($date)
+    -> search({
+      family_order => { '>' => $self->family_order },
+    });
+
+  my @people = map {
+    $_, $_->descendants_on_date($date)
+  } @younger_siblings;
+
+  return @people;
+}
+
+sub descendants_on_date {
+  my $self = shift;
+  my ($date) = @_;
+
+ $date = $self->result_source->schema->storage->
+         datetime_parser->format_datetime($date);
+
+  return $self->people({
+    born => { '<=' => $date },
+  }, {
+    order_by => 'family_order',
+  });
+}
+
+__PACKAGE__->meta->make_immutable;
+1;
diff --git a/lib/Succession/Schema/Result/Sovereign.pm b/lib/Succession/Schema/Result/Sovereign.pm
new file mode 100644
index 0000000..f4f1d33
--- /dev/null
+++ b/lib/Succession/Schema/Result/Sovereign.pm
@@ -0,0 +1,123 @@
+use utf8;
+package Succession::Schema::Result::Sovereign;
+
+# Created by DBIx::Class::Schema::Loader
+# DO NOT MODIFY THE FIRST PART OF THIS FILE
+
+=head1 NAME
+
+Succession::Schema::Result::Sovereign
+
+=cut
+
+use strict;
+use warnings;
+
+use Moose;
+use MooseX::NonMoose;
+use MooseX::MarkAsMethods autoclean => 1;
+extends 'DBIx::Class::Core';
+
+=head1 COMPONENTS LOADED
+
+=over 4
+
+=item * L<DBIx::Class::InflateColumn::DateTime>
+
+=back
+
+=cut
+
+__PACKAGE__->load_components("InflateColumn::DateTime");
+
+=head1 TABLE: C<sovereign>
+
+=cut
+
+__PACKAGE__->table("sovereign");
+
+=head1 ACCESSORS
+
+=head2 id
+
+  data_type: 'integer'
+  is_auto_increment: 1
+  is_nullable: 0
+
+=head2 start
+
+  data_type: 'date'
+  datetime_undef_if_invalid: 1
+  is_nullable: 0
+
+=head2 end
+
+  data_type: 'date'
+  datetime_undef_if_invalid: 1
+  is_nullable: 1
+
+=head2 person_id
+
+  data_type: 'integer'
+  is_foreign_key: 1
+  is_nullable: 0
+
+=cut
+
+__PACKAGE__->add_columns(
+  "id",
+  { data_type => "integer", is_auto_increment => 1, is_nullable => 0 },
+  "start",
+  { data_type => "date", datetime_undef_if_invalid => 1, is_nullable => 0 },
+  "end",
+  { data_type => "date", datetime_undef_if_invalid => 1, is_nullable => 1 },
+  "person_id",
+  { data_type => "integer", is_foreign_key => 1, is_nullable => 0 },
+);
+
+=head1 PRIMARY KEY
+
+=over 4
+
+=item * L</id>
+
+=back
+
+=cut
+
+__PACKAGE__->set_primary_key("id");
+
+=head1 RELATIONS
+
+=head2 person
+
+Type: belongs_to
+
+Related object: L<Succession::Schema::Result::Person>
+
+=cut
+
+__PACKAGE__->belongs_to(
+  "person",
+  "Succession::Schema::Result::Person",
+  { id => "person_id" },
+  { is_deferrable => 1, on_delete => "RESTRICT", on_update => "RESTRICT" },
+);
+
+
+# Created by DBIx::Class::Schema::Loader v0.07045 @ 2016-12-04 17:40:32
+# DO NOT MODIFY THIS OR ANYTHING ABOVE! md5sum:WN+m2I1O/MX5wUbD9leJdg
+
+
+# You can replace this text with custom code or comments, and it will be preserved on regeneration
+
+sub name {
+  return $_[0]->person->name;
+}
+
+sub succession_on_date {
+  return $_[0]->person->succession_on_date($_[1]);
+}
+
+__PACKAGE__->meta->make_immutable;
+1;
diff --git a/lib/Succession/Schema/ResultSet/Sovereign.pm b/lib/Succession/Schema/ResultSet/Sovereign.pm
new file mode 100644
index 0000000..fe04d07
--- /dev/null
+++ b/lib/Succession/Schema/ResultSet/Sovereign.pm
@@ -0,0 +1,25 @@
+package Succession::Schema::ResultSet::Sovereign;
+
+use Moose;
+use MooseX::NonMoose;
+
+extends 'DBIx::Class::ResultSet';
+
+sub BUILDARGS { $_[2] }
+
+sub sovereign_on_date {
+  my $self = shift;
+  my ($date) = @_;
+
+  $date = $self->result_source->schema->storage->
+          datetime_parser->format_datetime($date);
+
+  return $self->search({
+    start => { '<=' => $date },
+    end   => [ { '>=' => $date }, undef ],
+  });
+}
+
+__PACKAGE__->meta->make_immutable;
+
+1;