These two posters which will be offered for sale by Swann Auction Galleries in New York on August 7 illustrate the convoluted history of the Olympic Games during the Second World War era.

Alongside traditional examples of furniture, pictures, jewellery and works of art, Jack-Philippe Ruellan’s July 27 Summertime à Vannes auction will feature plenty of items associated with the local area: paintings showing views of Brittany and examples of its well-known Quimper pottery.

This pair of c.1970s Italian Onda (Wave) lounge chairs in chrome and leather designed by Giovanni Offredi for Saporiti Italia will feature in the Downtown Los Angeles Collections and Estates auction to be held on Sunday, July 28, by the Andrew Jones auction house.

This poster for Alfred Hitchcock’s The 39 Steps is one of the rarer entries in Heritage Auctions’ July 27-28 sale of posters to be held in Dallas.

Jackson’s of Cedar Falls, Iowa, has a reputation for selling Russian works of art. Its sale on July 30 will include 19 lots from the collection of William Garner Welbon (1866-1960) that have remained with his family.

Collection from grandson of director of the famous Duvelleroy firm is offered in Paris.

At a €2.7m (£2.45m) hammer price, a 17th century Flemish flower painting was the toast of the Old Master picture results in Paris this year. It was also the highest price recorded at the Drouot auction centre so far for 2019.

In September the Paris auction scene wakes up from its long summer slumber to get back into action for the approaching autumn and winter season.

A selection of art and antiques events taking place in Paris in September.

'La Biennale Paris' and 'Parcours des Mondes' bring the dealing scene in the French capital back to life after summer slumbers, while auction houses also rise to the occasion. We take an early glimpse at what will be on offer for the visitor in September.

September will be a key date in the diary for the French auction firm Osenat, which has announced its expansion with an extra venue and several new departments.

Views of Venice figure prominently in a collection of 42 Old Master drawings from the 18th century, being sold by Metz in Heidelberg on July 20.

From the 18th century onwards, the city of Birmingham was a major centre of the British gun-making industry.

Numerous tribes inhabit the Cross River state of south-eastern Nigeria, close to the border with Cameroon. Animals of many kinds play a major part in the myths and religions of the area.