diff --git a/the_works/models.py b/the_works/models.py
index ce163ee..3a6e0fa 100644
--- a/the_works/models.py
+++ b/the_works/models.py
@@ -2,16 +2,15 @@ from the_works.database import db
 from sqlalchemy.orm import relationship
 from sqlalchemy.ext.associationproxy import association_proxy
 
-# override/add __repr__() and _asdict() methods from sqlalchemy.orm.decl_api.Model for easier handling of table rows
-def __repr__(self):
-  return str({col.key: self.__getattribute__(col.key) for col in self.__table__.c})    
-
+# add method to sqlalchemy.orm.decl_api.Model
 def _asdict(self):
-  return {col.key: self.__getattribute__(col.key) for col in self.__table__.c} 
-
-db.Model.__repr__ = __repr__
+  return {col.key: "<BLOB>" if type(col.type) == db.types.BLOB else self.__getattribute__(col.key) for col in self.__table__.c} 
 db.Model._asdict = _asdict
 
+# override repr() method from sqlalchemy.orm.decl_api.Model 
+def __repr__(self):
+  return str(self._asdict())    
+db.Model.__repr__ = __repr__
 
 class Text(db.Model):
   __table__ = db.Model.metadata.tables['Text']
@@ -29,6 +28,7 @@ class Werk(db.Model):
   werksform = relationship("Werksform", back_populates="werk")
   veroeffentlichung = relationship("Veroeffentlichung", back_populates="werk")
   werk_genre = relationship("Werk_Genre", back_populates="werk", cascade="save-update, merge, delete, delete-orphan")
+  titelbild = relationship("Titelbild", back_populates="werk")
   genres = association_proxy("werk_genre", "Genre")
   werk_herausgeber = relationship("Werk_Herausgeber", back_populates="werk", cascade="save-update, merge, delete, delete-orphan")
   herausgeber = association_proxy("werk_herausgeber", "Herausgeber")
@@ -75,6 +75,10 @@ class Herausgeber(db.Model):
   __table__ = db.Model.metadata.tables['Herausgeber']
   werk_herausgeber = relationship("Werk_Herausgeber", back_populates="herausgeber")
 
+class Titelbild(db.Model):
+  __table__ = db.Model.metadata.tables['Titelbild']
+  werk = relationship("Werk", back_populates="titelbild")
+
 class Text_Genre(db.Model):
   __table__ = db.Model.metadata.tables['Text_Genre']
   text = relationship("Text", back_populates="text_genre")