Uncertainty over whether the work—once owned by Goering—was looted has apparently left it unsaleable

The experimental character and technical virtuosity of Old Master sketches are inspiring interest from new sectors of the art world.

From Liechtenstein to Lisbon, these collectors discuss their interests and methods

Raphael’s Head of a Young Apostle was the centre of attention during London’s Old Master week last month

Five artists describe how the ideas and techniques of the artists of the past have informed their work

Inspired by a talk at Christie’s, the collector has amassed 150 works from the 13th to 16th centuries, as well as Modern and contemporary pieces

Modern and contemporary art fairs are encouraging crossover collecting with a renewed focus on older art

Some truly stunning pieces are to appear on the block this year

Jeanne Marchig misses out

He is property developer David Lewis

After 40 years of silence, Lewis talks publicly on the eve of his major loan exhibition

The old master dealer on market caution, setting the record straight with Colnaghi, and working for a very private collector

Art and antiques fair builds on last year’s success of attracting high-spending collectors with a new section devoted to works on paper

Searching for underdrawings, conservators discover the artist’s reflection

Next year their collection of Dutch and Flemish 17th-century paintings goes on display for the first time in Europe and the US. The couple gave us their first ever interview

Faulty fire sprinkler “rained on” Leonardo’s portrait, reveals former director

Reinhold Würth has converted a church for old masters

Old masters, recovered as a result of one of the world’s largest Nazi restitution claims, net $20m

Salander-O’Reilly denies all charges

The Raphael was bought by the National Gallery for £22 million in February 2004

Two books try to shed new light on why Leonardo continues to exert a fascination for scholars, art historians and the public

Fragility of panels has made museums reluctant to lend

But the 139 works go to Dutch State, not collector’s heirs

Rediscovered Rembrandt made £6.9 million

Two studies of the Renaissance artist’s works reveal divergent assumptions about interpretation

Private collector vs State in Spain

A new exhibition takes a closer look at Leonardo's work on paper

Four drawings are being claimed by the heir of a Nazism victim

This makes it the first US city host Raphael drawings from the Lille Palais des beaux-arts’ renowned collection

The decadent show includes works from the Budapest Museum of Dine Arts, and is open until 4 August