--- a/src/pyams_portal/interfaces/__init__.py	Wed Sep 12 16:44:03 2018 +0200
+++ b/src/pyams_portal/interfaces/__init__.py	Thu Sep 13 16:30:44 2018 +0200
@@ -17,19 +17,17 @@
 
 # import interfaces
 from zope.annotation.interfaces import IAttributeAnnotatable
+from zope.container.constraints import contains
 from zope.container.interfaces import IContainer
 from zope.contentprovider.interfaces import IContentProvider
+from zope.interface import Interface, Attribute
 from zope.location.interfaces import ILocation, IContained
+from zope.schema import List, TextLine, Object, Int, Bool, Choice
 
+from pyams_portal import _
 # import packages
 from pyams_security.schema import PermissionField
 from pyams_utils.schema import PersistentDict, PersistentList
-from zope.container.constraints import contains
-from zope.interface import Interface, Attribute
-from zope.schema import List, TextLine, Object, Int, Bool, Choice
-
-from pyams_portal import _
-
 
 MANAGE_TEMPLATE_PERMISSION = 'pyams_portal.manage_template'
 
@@ -62,6 +60,10 @@
     settings_factory = Attribute("Portlet settings factory")
 
 
+class IPortletCSSClass(Interface):
+    """Portlet CSS class interface"""
+
+
 class IPortletAddingInfo(Interface):
     """Portlet adding info interface"""
 

--- a/src/pyams_portal/portlet.py	Wed Sep 12 16:44:03 2018 +0200
+++ b/src/pyams_portal/portlet.py	Thu Sep 13 16:30:44 2018 +0200
@@ -44,7 +44,7 @@
 from pyramid.threadlocal import get_current_registry
 from zope.container.contained import Contained
 from zope.copy import clone
-from zope.interface import implementer, alsoProvides, noLongerProvides, Interface
+from zope.interface import implementer, alsoProvides, noLongerProvides
 from zope.lifecycleevent import ObjectCreatedEvent
 from zope.location import locate
 from zope.schema.fieldproperty import FieldProperty

--- a/src/pyams_portal/templates/pagelet.pt	Wed Sep 12 16:44:03 2018 +0200
+++ b/src/pyams_portal/templates/pagelet.pt	Thu Sep 13 16:30:44 2018 +0200
@@ -10,8 +10,8 @@
 						 tal:condition="slot_config.visible"
 						 tal:attributes="class string:slot col ${slot_config.get_css_class()}">
 						<div class="portlets">
-							<div class="portlet"
-								 tal:repeat="portlet_id template_config.slot_config[slot_name].portlet_ids">
+							<div tal:repeat="portlet_id template_config.slot_config[slot_name].portlet_ids"
+								 class="portlet ${view.get_portlet_css_class(portlet_id)}">
 								<tal:var replace="structure view.render_portlet(portlet_id)">Content</tal:var>
 							</div>
 						</div>

--- a/src/pyams_portal/views.py	Wed Sep 12 16:44:03 2018 +0200
+++ b/src/pyams_portal/views.py	Thu Sep 13 16:30:44 2018 +0200
@@ -15,19 +15,19 @@
 
 # import standard library
 
-# import interfaces
-from pyams_portal.interfaces import IPortalContext, IPortalPage, IPortalTemplateConfiguration, \
-    IPortalPortletsConfiguration, IPortletRenderer, IPortlet, PREVIEW_MODE
-from pyams_skin.layer import IPyAMSUserLayer
-from pyams_utils.interfaces import VIEW_SYSTEM_PERMISSION
-from pyams_workflow.interfaces import IWorkflowPublicationInfo
+from pyramid.decorator import reify
+from pyramid.exceptions import NotFound
 
 # import packages
 from pyams_default_theme.page import BaseIndexPage
 from pyams_pagelet.pagelet import pagelet_config
+# import interfaces
+from pyams_portal.interfaces import IPortalContext, IPortalPage, IPortalTemplateConfiguration, \
+    IPortalPortletsConfiguration, IPortletRenderer, IPortlet, PREVIEW_MODE, IPortletCSSClass
+from pyams_skin.layer import IPyAMSUserLayer
 from pyams_template.template import template_config
-from pyramid.decorator import reify
-from pyramid.exceptions import NotFound
+from pyams_utils.interfaces import VIEW_SYSTEM_PERMISSION
+from pyams_workflow.interfaces import IWorkflowPublicationInfo
 
 
 class BasePortalContextIndexPage(BaseIndexPage):
@@ -67,6 +67,11 @@
     def get_portlet(self, name):
         return self.request.registry.getUtility(IPortlet, name=name)
 
+    def get_portlet_css_class(self, portlet_id):
+        configuration = self.portlet_configuration.get_portlet_configuration(portlet_id)
+        portlet = self.get_portlet(configuration.portlet_name)
+        return self.request.registry.queryMultiAdapter((portlet, self.request), IPortletCSSClass, default='')
+
     def render_portlet(self, portlet_id):
         renderer = self.portlets.get(portlet_id)
         if renderer is not None: