Dream of building, chased, person, woke up

When I realized I was dreaming I knew right away there was a significance, I never dream and when I do it is almost always deep and beyond my understanding. I arrived at a place instantly, it was very dark but I could make out objects in the distance. I felt as though this place hadn't been visited in an extremely long time. The place was filled with dust. It was hard to breath and I could see specks of dust floating in the air but it aided me in seeing where I was. I knew I was in a house and it seemed to be very large. I saw furniture and other things but my attention was almost completed on roaming as if I was looking for something. Everything was gray and I had been walking forever, there were a lot of rooms and hallways but yet I never second guessed where I was going. I arrived at a larger room than I had seen throughout the house so far. After staring for awhile I believe I was in the dining area. There was a gigantic table which contained at least a dozen chairs. At the end of this very long table was a figure sitting. As I walked closer and closer I knew it was a person. I walked closer and could make out only a skinny figure with a long black coat over a suit with long, thin, gray hair. He or she was wearing a black hat as well with their face slightly tilted downward. I began to wonder if they were living or dead, but felt uneasy as if the person was watching my every step. Oddly enough I left the room without pursing an explanation and found the exit with ease. As I walked outside it seemed the area was still heavily gray but there was more color. It seemed I was in a private area with acres of land. I saw a small broken down house or barn and started walking toward it. Out of the corner of my eye I could see a light in the distance, it could have been anything but I knew it was a large building. A lighthouse maybe but I honestly don't have a very good clue as to what it was. I approached the side of the barn/ small house and don't remember much but I think I was attacked and then chased by someone or something with a large figure. Then I woke up.