Hi Clarisse,
I couldn't find a direct table with all themes, but you can query the eSpace references and get all themes that are used in your factory:

The result:

The SQL
SELECT DISTINCT Name,
Producer_Name
FROM (
SELECT {Espace_Reference}.[Name] Name,
{Espace_Reference}.[Producer_Name] Producer_Name
FROM {Espace}
JOIN {Espace_Version} ON {Espace_Version}.[Id] = {Espace}.[Version_Id]
JOIN {Espace_Reference} ON {Espace_Reference}.[Consumer_Version_Id] = {Espace_Version}.[Id]
WHERE {Espace_Reference}.[Kind] = 'Theme'
) TEMP
Cheers