Thanks to everyone with suggestions about Spain (and especially thanks to the top off that the Senatus Consultum de Pisone may not be on display, which caused a change of plan from the Seville Archeological Museum). I did however get to the Museum in Madrid, which has recently had a wonderful make-over. The classical collections look truly amazing .. well worth a detour as Mr Michelin might say.
This gives something of the general flavour and style of the place.
There's loads of space, neatly combined with a nice sense of proximity (between sculptures, and between sculpture and viewer). And there are also some stunning, and if not stunning then interesting, individual pieces.