diff --git a/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/HasMasterAuthoritiesAttribute.cs b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/HasMasterAuthoritiesAttribute.cs
new file mode 100644
index 0000000..7203b0b
--- /dev/null
+++ b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/HasMasterAuthoritiesAttribute.cs
@@ -0,0 +1,18 @@
+namespace Suspectus.Gandalf.Palantir.Data.MasterData.Atttibutes;
+
+[AttributeUsage(AttributeTargets.Field)]
+public class HasMasterAuthoritiesAttribute : Attribute
+{
+    public IReadOnlyList<string> Authorities { get; init; } = [];
+    public bool AllAuthorities { get; init; }
+
+    public HasMasterAuthoritiesAttribute(params string[] authorities)
+    {
+        Authorities = authorities;
+    }
+    
+    public HasMasterAuthoritiesAttribute(bool allAuthorities)
+    {
+        AllAuthorities = allAuthorities;   
+    }
+}
\ No newline at end of file
diff --git a/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/HasMasterRolesAttribute.cs b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/HasMasterRolesAttribute.cs
new file mode 100644
index 0000000..15013fa
--- /dev/null
+++ b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/HasMasterRolesAttribute.cs
@@ -0,0 +1,18 @@
+namespace Suspectus.Gandalf.Palantir.Data.MasterData.Atttibutes;
+
+[AttributeUsage(AttributeTargets.Field)]
+public class HasMasterRolesAttribute : Attribute
+{
+    public IReadOnlyList<string> Roles { get; init; } = [];
+    public bool AllRoles { get; init; }
+
+    public HasMasterRolesAttribute(params string[] roles)
+    {
+        Roles = roles;
+    }
+    
+    public HasMasterRolesAttribute(bool allRoles)
+    {
+        AllRoles = allRoles;   
+    }
+}
\ No newline at end of file
diff --git a/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/MasterAuthorityAttribute.cs b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/MasterAuthorityAttribute.cs
new file mode 100644
index 0000000..007cea5
--- /dev/null
+++ b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/MasterAuthorityAttribute.cs
@@ -0,0 +1,14 @@
+namespace Suspectus.Gandalf.Palantir.Data.MasterData.Atttibutes;
+
+[AttributeUsage(AttributeTargets.Field)]
+public class MasterAuthorityAttribute : Attribute
+{
+    public string? OldKey { get; init; }
+
+    public MasterAuthorityAttribute() {}
+    
+    public MasterAuthorityAttribute(string? oldKey)
+    {
+        OldKey = oldKey;
+    }
+}
\ No newline at end of file
diff --git a/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/MasterGroupAttribute.cs b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/MasterGroupAttribute.cs
new file mode 100644
index 0000000..234d0a3
--- /dev/null
+++ b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/MasterGroupAttribute.cs
@@ -0,0 +1,14 @@
+namespace Suspectus.Gandalf.Palantir.Data.MasterData.Atttibutes;
+
+[AttributeUsage(AttributeTargets.Field)]
+public class MasterGroupAttribute : Attribute
+{
+    public string? OldKey { get; init; }
+
+    public MasterGroupAttribute() {}
+    
+    public MasterGroupAttribute(string? oldKey)
+    {
+        OldKey = oldKey;
+    }
+}
\ No newline at end of file
diff --git a/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/MasterRoleAttribute.cs b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/MasterRoleAttribute.cs
new file mode 100644
index 0000000..777286e
--- /dev/null
+++ b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/Atttibutes/MasterRoleAttribute.cs
@@ -0,0 +1,14 @@
+namespace Suspectus.Gandalf.Palantir.Data.MasterData.Atttibutes;
+
+[AttributeUsage(AttributeTargets.Field)]
+public class MasterRoleAttribute : Attribute
+{
+    public string? OldKey { get; init; }
+
+    public MasterRoleAttribute() {}
+    
+    public MasterRoleAttribute(string? oldKey)
+    {
+        OldKey = oldKey;
+    }
+}
\ No newline at end of file
diff --git a/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/MasterAuthorities.cs b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/MasterAuthorities.cs
new file mode 100644
index 0000000..7bad799
--- /dev/null
+++ b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/MasterAuthorities.cs
@@ -0,0 +1,59 @@
+using System.ComponentModel;
+using System.Reflection;
+using Suspectus.Gandalf.Palantir.Data.MasterData.Atttibutes;
+
+namespace Suspectus.Gandalf.Palantir.Data.MasterData;
+
+public static class MasterAuthorities
+{
+    public static class Profile
+    {
+        [MasterAuthority] [Description("Allows to view any profile.")]
+        public const string Read = "g.profile.read";
+
+        [MasterAuthority] [Description("Allows to edit any profile.")]
+        public const string Write = "g.profile.write";
+
+        public static class Self
+        {
+            [MasterAuthority] [Description("Allows to view your own profile.")]
+            public const string Read = "g.profile.self.read";
+
+            [MasterAuthority] [Description("Allows to edit your own profile.")]
+            public const string Write = "g.profile.self.write";
+        }
+    }
+
+    public static List<MasterAuthorityData> GetAllAuthorities()
+    {
+        var authorities = new List<FieldInfo>();
+        CollectFields(typeof(MasterAuthorities));
+        
+        return authorities
+            .Select(x => new MasterAuthorityData
+            {
+                Name = (string)x.GetValue(null)!,
+                OldName = x.GetCustomAttribute<MasterAuthorityAttribute>()!.OldKey,
+                Description = x.GetCustomAttribute<DescriptionAttribute>()?.Description ?? null
+            }).ToList();
+
+        void CollectFields(Type type)
+        {
+            var fields = type
+                .GetFields(BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy)
+                .Where(f => f.FieldType == typeof(string) && Attribute.IsDefined(f, typeof(MasterAuthorityAttribute)));
+
+            authorities.AddRange(fields);
+
+            foreach (var nested in type.GetNestedTypes())
+                CollectFields(nested);
+        }
+    }
+    
+    public class MasterAuthorityData
+    {
+        public string Name { get; set; } = null!;
+        public string? OldName { get; set; }
+        public string? Description { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/MasterGroups.cs b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/MasterGroups.cs
new file mode 100644
index 0000000..b3e4a41
--- /dev/null
+++ b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/MasterGroups.cs
@@ -0,0 +1,61 @@
+using System.ComponentModel;
+using System.Reflection;
+using Suspectus.Gandalf.Palantir.Data.MasterData.Atttibutes;
+
+namespace Suspectus.Gandalf.Palantir.Data.MasterData;
+
+public static class MasterGroups
+{
+    [MasterGroup]
+    [Description("Contains the minimal set of Roles to use the application.")]
+    [HasMasterRoles(MasterRoles.SelfProfile)]
+    public const string BasicUser = "Basic User";
+    
+    public static List<MasterGroupData> GetAllGroups()
+    {
+        var groups = new List<FieldInfo>();
+        CollectFields(typeof(MasterGroups));
+        
+        return groups
+            .Select(x => new MasterGroupData
+            {
+                Name = (string)x.GetValue(null)!,
+                OldName = x.GetCustomAttribute<MasterGroupAttribute>()!.OldKey,
+                Description = x.GetCustomAttribute<DescriptionAttribute>()?.Description ?? null,
+                Roles = GetRoles(x)
+            }).ToList();
+
+        IReadOnlyList<string> GetRoles(FieldInfo field)
+        {
+            var hasMasterRolesAttribute = field.GetCustomAttribute<HasMasterRolesAttribute>();
+
+            if (hasMasterRolesAttribute is null)
+                return [];
+            
+            if (hasMasterRolesAttribute.AllRoles)
+                return MasterRoles.GetAllRoles().Select(x => x.Name).ToList();
+
+            return hasMasterRolesAttribute.Roles;
+        }
+        
+        void CollectFields(Type type)
+        {
+            var fields = type
+                .GetFields(BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy)
+                .Where(f => f.FieldType == typeof(string) && Attribute.IsDefined(f, typeof(MasterGroupAttribute)));
+
+            groups.AddRange(fields);
+
+            foreach (var nested in type.GetNestedTypes())
+                CollectFields(nested);
+        }
+    }
+    
+    public class MasterGroupData
+    {
+        public required string Name { get; set; }
+        public string? OldName { get; set; }
+        public string? Description { get; set; }
+        public IReadOnlyList<string> Roles { get; set; } = [];
+    }
+}
\ No newline at end of file
diff --git a/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/MasterRoles.cs b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/MasterRoles.cs
new file mode 100644
index 0000000..abc390e
--- /dev/null
+++ b/src/dotnet/Suspectus.Gandalf.Palantir.Data/MasterData/MasterRoles.cs
@@ -0,0 +1,66 @@
+using System.ComponentModel;
+using System.Reflection;
+using Suspectus.Gandalf.Palantir.Data.MasterData.Atttibutes;
+
+namespace Suspectus.Gandalf.Palantir.Data.MasterData;
+
+public static class MasterRoles
+{
+    [MasterRole]
+    [Description("Allows everything.")]
+    [HasMasterAuthorities(true)]
+    public const string Housemaster = nameof(Housemaster);
+    
+    [MasterRole]
+    [Description("Allows to view your own profile.")]
+    [HasMasterAuthorities(MasterAuthorities.Profile.Self.Read, MasterAuthorities.Profile.Self.Write)]
+    public const string SelfProfile = "Self Profile";
+    
+    public static List<MasterRoleData> GetAllRoles()
+    {
+        var roles = new List<FieldInfo>();
+        CollectFields(typeof(MasterRoles));
+        
+        return roles
+            .Select(x => new MasterRoleData
+            {
+                Name = (string)x.GetValue(null)!,
+                OldName = x.GetCustomAttribute<MasterRoleAttribute>()!.OldKey,
+                Description = x.GetCustomAttribute<DescriptionAttribute>()?.Description ?? null,
+                Authorities = GetAuthorities(x)
+            }).ToList();
+
+        IReadOnlyList<string> GetAuthorities(FieldInfo field)
+        {
+            var hasMasterAuthoritiesAttribute = field.GetCustomAttribute<HasMasterAuthoritiesAttribute>();
+
+            if (hasMasterAuthoritiesAttribute is null)
+                return [];
+            
+            if (hasMasterAuthoritiesAttribute.AllAuthorities)
+                return MasterAuthorities.GetAllAuthorities().Select(x => x.Name).ToList();
+
+            return hasMasterAuthoritiesAttribute.Authorities;
+        }
+        
+        void CollectFields(Type type)
+        {
+            var fields = type
+                .GetFields(BindingFlags.Public | BindingFlags.Static | BindingFlags.FlattenHierarchy)
+                .Where(f => f.FieldType == typeof(string) && Attribute.IsDefined(f, typeof(MasterRoleAttribute)));
+
+            roles.AddRange(fields);
+
+            foreach (var nested in type.GetNestedTypes())
+                CollectFields(nested);
+        }
+    }
+    
+    public class MasterRoleData
+    {
+        public required string Name { get; set; }
+        public string? OldName { get; set; }
+        public string? Description { get; set; }
+        public IReadOnlyList<string> Authorities { get; set; } = [];
+    }
+}
\ No newline at end of file