A seasonal photo collection of the Grand-Duchy

You may wonder why putting photos of the 4 seasons on the Internet. Everybody knows how nature looks like during a year. Well, if you think like this you are wrong. Working in IT for quite some time, I was suprised to meet many people who are not familiar with the seasons how we know them in Central Europe. :)
I've divided the photo collection in 5 chapters. The first chapter, covering the beginning of the year, can be considered as a preface. The chapters are not in chronological order. They span over several years. They also contain a small text, describing a little bit the context in which the photos have been taken.
So here they are:
Chapter 1 - The End of the Winter
Chapter 2 - The Spring
Chapter 3 - The Summer
Chapter 4 - The Automn
Chapter 5 - The Winter