diff -r d565e0a0c8f3 -r f2cc8872bcc1 src/pyams_content/shared/site/interfaces.py
--- a/src/pyams_content/shared/site/interfaces.py	Wed Sep 02 17:48:47 2020 +0200
+++ b/src/pyams_content/shared/site/interfaces.py	Mon Sep 07 17:25:59 2020 +0200
@@ -9,10 +9,6 @@
 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
 # FOR A PARTICULAR PURPOSE.
 #
-from pyams_content.shared.common.interfaces.types import DATA_TYPES_VOCABULARY
-
-
-__docformat__ = 'restructuredtext'
 
 from collections import OrderedDict
 
@@ -23,16 +19,22 @@
 from zope.schema import Bool, Choice, Text, URI
 from zope.schema.vocabulary import SimpleTerm, SimpleVocabulary
 
-from pyams_content import _
 from pyams_content.interfaces import IBaseContent
-from pyams_content.shared.common.interfaces import IBaseContentManagerRoles, IBaseSharedTool, IDeletableElement, \
-    ISharedSite
+from pyams_content.shared.common.interfaces import IBaseContentManagerRoles, IBaseSharedTool, \
+    IDeletableElement, ISharedSite
+from pyams_content.shared.common.interfaces.types import DATA_TYPES_VOCABULARY
 from pyams_content.shared.topic.interfaces import ITopic, IWfTopic, IWfTopicFactory
 from pyams_i18n.schema import I18nTextField, I18nTextLineField
-from pyams_sequence.interfaces import IInternalReference, IInternalReferencesList, ISequentialIdTarget
+from pyams_sequence.interfaces import IInternalReference, IInternalReferencesList, \
+    ISequentialIdTarget
 from pyams_workflow.interfaces import IWorkflowPublicationSupport
 
 
+__docformat__ = 'restructuredtext'
+
+from pyams_content import _
+
+
 FOLDER_REDIRECT_DISPLAY_MODE = 'redirect'
 FOLDER_TEMPLATE_DISPLAY_MODE = 'template'
 
@@ -41,7 +43,8 @@
     (FOLDER_TEMPLATE_DISPLAY_MODE, _("Use presentation template"))
 ))
 
-FOLDER_DISPLAY_MODE_VOCABULARY = SimpleVocabulary([SimpleTerm(v, title=t) for v, t in FOLDER_DISPLAY_MODES.items()])
+FOLDER_DISPLAY_MODE_VOCABULARY = SimpleVocabulary([SimpleTerm(v, title=t)
+                                                   for v, t in FOLDER_DISPLAY_MODES.items()])
 
 
 class ISiteElement(IContained, IDeletableElement):
@@ -85,9 +88,11 @@
                            required=False)
 
     description = I18nTextField(title=_("Meta-description"),
-                                description=_("The folder's description is 'hidden' into HTML's page headers; but it "
-                                              "can be seen, for example, in some search engines results as content's "
-                                              "description; if description is empty, content's header will be used."),
+                                description=_("The folder's description is 'hidden' into HTML's "
+                                              "page headers; but it can be seen, for example, in "
+                                              "some search engines results as content's "
+                                              "description; if description is empty, content's "
+                                              "header will be used."),
                                 required=False)
 
     notepad = Text(title=_("Notepad"),
@@ -95,13 +100,15 @@
                    required=False)
 
     visible_in_list = Bool(title=_("Visible in folders list"),
-                           description=_("If 'no', folder will not be displayed into folders list"),
+                           description=_("If 'no', folder will not be displayed into folders "
+                                         "list"),
                            required=True,
                            default=True)
 
     navigation_title = I18nTextLineField(title=_("Navigation title"),
-                                         description=_("Folder's title displayed in navigation pages; "
-                                                       "original title will be used if none is specified"),
+                                         description=_("Folder's title displayed in navigation "
+                                                       "pages; original title will be used if "
+                                                       "none is specified"),
                                          required=False)
 
     navigation_mode = Choice(title=_("Navigation mode"),
@@ -119,7 +126,8 @@
     """Site folder roles interface"""
 
 
-class ISiteManager(ISharedSite, ISiteContainer, IBaseSharedTool, IDeletableElement, ISequentialIdTarget):
+class ISiteManager(ISharedSite, ISiteContainer, IBaseSharedTool,
+                   IDeletableElement, ISequentialIdTarget):
     """Site manager interface"""
 
     contains(ISiteElement)
@@ -129,10 +137,16 @@
     topic_content_type = Attribute("Topic content type")
     topic_content_factory = Attribute("Topic content factory")
 
+    header = I18nTextField(title=_("Header"),
+                           description=_("Site's header is generally displayed in page header"),
+                           required=False)
+
     description = I18nTextField(title=_("Meta-description"),
-                                description=_("The site's description is 'hidden' into HTML's page headers; but it "
-                                              "can be seen, for example, in some search engines results as content's "
-                                              "description; if description is empty, content's header will be used."),
+                                description=_("The site's description is 'hidden' into HTML's "
+                                              "page headers; but it can be seen, for example, in "
+                                              "some search engines results as content's "
+                                              "description; if description is empty, content's "
+                                              "header will be used."),
                                 required=False)
 
     notepad = Text(title=_("Notepad"),
@@ -169,8 +183,9 @@
     """Site link interface"""
 
     navigation_title = I18nTextLineField(title=_("Navigation title"),
-                                         description=_("Alternate content's title displayed in navigation pages; "
-                                                       "original title will be used if none is specified"),
+                                         description=_("Alternate content's title displayed in "
+                                                       "navigation pages; original title will be "
+                                                       "used if none is specified"),
                                          required=False)
 
     show_header = Bool(title=_("Show header?"),
@@ -179,8 +194,9 @@
                        default=True)
 
     navigation_header = I18nTextField(title=_("Navigation header"),
-                                      description=_("Alternate content's header displayed in navigation pages; "
-                                                    "original header will be used if none is specified"),
+                                      description=_("Alternate content's header displayed in "
+                                                    "navigation pages; original header will be "
+                                                    "used if none is specified"),
                                       required=False)
 
     visible = Bool(title=_("Visible?"),