diff --git a/api/app/infrastructure/database/models/__init__.py b/api/app/application/__init__.py
similarity index 100%
rename from api/app/infrastructure/database/models/__init__.py
rename to api/app/application/__init__.py
diff --git a/api/app/config.py b/api/app/config.py
new file mode 100644
index 0000000..e69de29
diff --git a/api/app/controllers/__init__.py b/api/app/controllers/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/api/app/core/config.py b/api/app/core/config.py
deleted file mode 100644
index 11d4a53..0000000
--- a/api/app/core/config.py
+++ /dev/null
@@ -1,11 +0,0 @@
-from pydantic import BaseSettings
-
-
-class Settings(BaseSettings):
-    DATABASE_URL: str = "postgresql+asyncpg://user:password@localhost:5432/dbname"
-
-    class Config:
-        env_file = ".env"
-
-
-settings = Settings()
diff --git a/api/app/database/__init__.py b/api/app/database/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/api/app/infrastructure/database/session.py b/api/app/database/session.py
similarity index 90%
rename from api/app/infrastructure/database/session.py
rename to api/app/database/session.py
index 57da850..0d05360 100644
--- a/api/app/infrastructure/database/session.py
+++ b/api/app/database/session.py
@@ -1,6 +1,6 @@
 from sqlalchemy.ext.asyncio import AsyncSession, create_async_engine
 from sqlalchemy.orm import sessionmaker
-from app.core.config import settings
+from app.config import settings
 
 engine = create_async_engine(settings.DATABASE_URL, echo=True)
 
diff --git a/api/app/domain/__init__.py b/api/app/domain/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/api/app/domain/models/__init__.py b/api/app/domain/models/__init__.py
new file mode 100644
index 0000000..7c2377a
--- /dev/null
+++ b/api/app/domain/models/__init__.py
@@ -0,0 +1,3 @@
+from sqlalchemy.ext.declarative import declarative_base
+
+Base = declarative_base()
\ No newline at end of file
diff --git a/api/app/domain/models/lenses_types.py b/api/app/domain/models/lenses_types.py
new file mode 100644
index 0000000..181fec8
--- /dev/null
+++ b/api/app/domain/models/lenses_types.py
@@ -0,0 +1,11 @@
+from sqlalchemy import Column, Integer, VARCHAR, ForeignKey
+from sqlalchemy.orm import relationship
+
+from app.domain.models import Base
+
+
+class LensesType(Base):
+    __tablename__ = 'lenses_types'
+
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    title = Column(VARCHAR(150), nullable=False, unique=True)
diff --git a/api/app/infrastructure/__init__.py b/api/app/infrastructure/__init__.py
new file mode 100644
index 0000000..e69de29