Mnemonic Room System

The following is a definition of "Mnemonic Room System" from (the infamous) Wikipedia:

"A mnemonic room system, or Roman room method, is a method of remembering items using a description of a room, based on creating an association between the item and the room. For example, if one wished to remember the items (dog, envelope, thirteen, wool, window), one could visualise a room, possibly one's own sitting room, and associate a particular item with a particular object/spot/position within the room: imagine a rainbow coloured dog sitting astride the dining table with a ludicrously long rainbow coloured tail snaking through all the chairs; imagine the walls covered in vivid paintings which all have envelopes as their subject in some way, every single painting; imagine a television with the shape of the digits 1 and 3 side by side, which is unlucky as it means nothing can be clearly seen the screen, only some voice somebody saying "unlucky for some" over and over again; imagine the dog is eating a bowl of blues spaghetti, which, upon closer inspection, appears to be blue wool; imagine the floor is a window through which only mud is visible, and it keeps cracking every time weight is put on it - a useless window in a silly place."

So, in sum, this mnemonic procedure allows one to use imagination as means to create memorable things or items in order for there to be a strong impression from which certain desirable information may be recalled from memory. Those Romans were ingenious!