The Prado Museum in Madrid holds one of the world's finest art collections. One good way of accessing its holdings is to use the the Museum's own Online gallery, currently offering 1,076 works of art. One way to explore the Online gallery is to check out this page and go from there.
These six pilaster saints were on display not that long ago at the National Gallery, London.
The six panels were discovered, wrapped in newspaper, in an English church in 1995. It appears that they were painted by Jacopo Di Cione and his workshop in Florence, Italy, sometime around 1365-1370.
The Gemäldegalerie in Berlin is one of the world's great museums. You can get a feel for what it might be like to spend a day there by reading this long blog entry, complete with photos. The photos are not always great and a few of the comments are unfortunate. On the whole, though, this page will give you a real sense of being at the Museum and viewing the fabulous works mounted on its walls.
The early pages of a Book of Hours will usually contain a multi-page calendar of the year's feastdays. In an elaborate book, the calendar for each month will begin with an illustration of activities typical of that month and, oddly, the month's astrological sign.
Activities for August usually have to do with the harvest -- harvesting the wheat, binding the sheaves, and threshing. Swimming and falconry are other possibilities. The zodiacal sign for August is the Virgin, Virgo.
Here are the August illustrations from four different Books of Hours:
August, c. 1405, from Les Belles Heures du Duc de Berry, illuminated by the Limbourg brothers;
August, c. 1412, from the Tres Riches Heures, by the Limbourg brothers;
August, c. 1500, from the Hours of Henry VIII, illuminated by Jean Poyer;
August, c. 1515, from the Da Costa Hours, illuminated by Simon Bening.