old mcdonald:Jacobus, You made such a good job of explaining insolvency that I am sure you can come up with a straightforward explanation of Treasure Trove and the rights and expectations of those who find valuable objects whilst metal detecting, or just cultivating their land.
Ah, but then I was writing from knowledge rather than ignorance. There are loads of websites out there which give the legal position in the UK and elsewhere but a brief summary of the UK position would be as follows:
In England and Wales, The Treasure Act 1996 deals with finds of treasure. It legally obliges finders of ‘treasure' to report the find to their local coroner within fourteen days of either finding it or of realising that it could be treasure'. An inquest led by the coroner then determines whether the find constitutes treasure or not. If is declared to be treasure then the owner must offer the item for sale to a museum at a price set by an independent board of antiquities experts. If no museum expresses an interest in the item or is unable to purchase it then it is returned to the landowner.
'Treasure' is defined as being:
Under English law a landowner has sole title to any archaeological artifacts found on his or her property. Legitimate metal detectorists would normally have an agreement with the land owner to share any proceeds from finds.
It should be borne in mind that it is illegal to use metal detectors or to excavate on scheduled ancient monuments and those in various Stewardship schemes may find clauses in their agreements relating to relevant landscape features on their land.
The law in Scotland is different (of course) and all archaeological finds, except for coins from the reign of Victoria onwards, automatically belong to the Crown. All finds must be reported to the Treasure Trove unit of the National Museums of Scotland. If the Crown decides it doesn't want the find then it would be returned to the landowner.
As far as Portugal is concerned there seem to be loads of laws governing objects of archaeological or cultural importance and the only detailed site I could find seemed to be a very convoluted translation. Suffice it to say that it seems that almost every department of government is involved, and I think that if you ever attempt to take one of your phalluses (phalli?) out of the country you will need the permission of the Minister of Culture as a bare minimum!