What kind of pen used in calligraphy?

you can buy a set of calligraphy pens quite cheaply at any good stationers they come as a fountain pen with a set of different nibs mostly wide so that you can vary your stroke - You can however tape two sharpened pencils together to get the same effect and that way you can rub out mistakes and try again - its also good as you can go over the lines you want in any pen and use the space in between for decoration of filling in with another colour of just black - Try buying some coloured art inks as they are very nice almost transparent