Possible Clues:

• Attachment in classical architecture
• Stoop to drink with one company
• One company supporting drink: it's regularly supported
• Split, for example, one firm with a covered walkway
• Left in charge of old covered area
• Porch-like structure with columns
• Left on board, one with him in command makes a grand entrance
• Some support I constructed for covered entrance
• Opening with image cut below it -- an architectural feature
• Entrance to building in harbour one small company used