You are an expert at summarizing long articles. Proceed to summarize the following text:

You are an expert at summarizing long articles. Proceed to summarize the following text: 
BACKGROUND OF THE INVENTION 
     The present invention relates to a building block particularly usable, by stacking, in the field of interior or external building or in the field of interior decoration. 
     It is currently known to use, in the construction of buildings, hollow or solid blocks or bricks which are stacked on top of each other and staggered, with layers of mortar interposed to allow rigid mutual bonding of said bricks. 
     However, this known art has some drawbacks: such bricks in fact are heavy. This increases difficulty in laying and can cause damage if they slip from the bricklayer&#39;s grip. 
     The working space can furthermore be easily soiled by the mortar which falls when the bricks are laid. 
     In any case, laying such bricks requires specialized personnel. 
     SUMMARY OF THE INVENTION 
     An aim of the present invention is therefore to solve the described technical problems by eliminating the drawbacks described in known types and thus providing a building block, according to the present invention, which allows the easy and rapid construction of load-bearing walls or partitions even by personnel which is not specifically trained. 
     Within the scope of the above aim, an important object is to provide a block which can be handled in conditions of maximum safety both for the user and for the surrounding space. 
     Another important object is to provide a block the laying whereof keeps the surrounding space clean. 
     Yet another object is to provide a block which is reliable and safe in use, has modest manufacturing costs and allows to build a wall which is aesthetically finished. 
     With the foregoing and other objects in view, there is provided a building block particularly usable by stacking in the field of interior or external building or in the field of interior decoration, characterized in that it comprises a hollow body which has modular dimensions and is provided, in an upward region, with one or more means for temporary coupling to engagement means formed underneath said hollow body, at least one hollow blind frog for bonding means being formed above said hollow body. Advantageously, one or more elements for connection to one or more frameworks are present laterally to the hollow body. 
     Conveniently, furthermore, one or more anchoring brackets are associable above the hollow body. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Further characteristics and advantages of the building block according to the present invention will become apparent from the following detailed description of a particular but not exclusive embodiment thereof, illustrated only by way of non-limitative example in the accompanying drawings, wherein: 
     FIG. 1, 1A and 1B are respectively a lateral perspective view of the block according to the present invention and of types related to said block; 
     FIG. 2 is a bottom view, similar to the preceding one, of the block; 
     FIG. 3 is a lateral perspective view of the block and of a cage; 
     FIG. 4 is a top view of two mutually adjacent blocks; 
     FIG. 5 shows a possible mutual arrangement of a plurality of blocks; 
     FIG. 6 is a sectional view, taken along a transverse median plane, of a plurality of mutually stacked blocks; 
     FIG. 7 shows a further arrangement for the blocks; 
     FIG. 8 illustrates a block usable for electric systems; 
     FIGS. 9, 10 and 11 illustrate some particular configurations for the block. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     With reference to the above figures, the reference numeral 1 designates the block, which is particularly usable, by mutual stacking, in the field of interior or external building, for example for the construction of dividing walls or gazebos, and in the field of interior decoration, for example for building shelves or table legs. 
     Each of said blocks 1 is constituted by a hollow body 2, which is preferably shaped like a parallelepiped with a square or rectangular base and preferably made of plastics. 
     At its lateral surfaces 3, each of said hollow bodies 2 can be appropriately colored or bear silk-screen printing. 
     Furthermore, the dimensions of each block 1 are such as to obtain a modular system, so that for example the length of each hollow body 2 is a multiple of its width. 
     A flat surface 4 is present in the upper region of said hollow body 2, and an opening 5 is formed in the lower region thereof. 
     Temporary coupling means, preferably constituted by one or more studs 6 with a circular or polygonal plan shape, furthermore protrude at the flat surface 4. 
     If multiple studs 6 are used at the same flat surface 4, care is taken to arrange them at a pitch equal to their width. 
     Said temporary coupling means interact with first engagement means formed beneath the hollow body 2; said engagement means are constituted by first seats 7 for accommodating said studs 6, which are associated in a snap-together manner by virtue of the presence of one or more wings 8 provided laterally with respect to said first seats 7; said wings protrude underneath the flat surface 4, and at least one of them is elastically deformable to allow the placement of the stud within the first seats 7 and lock it in this position. 
     A recess or frog 9 is furthermore formed at the flat surface 4 and is open at the top and closed downwardly by a bottom element 10 which connects the lower perimetric edges 11 of the lateral surfaces 3. 
     A first central hole 12, for means for anchoring to the ground such as, for example, a screw anchor 13, is formed at the bottom 10. 
     One or more second lateral holes 14 are also formed at the bottom 10 and act as seats for further anchoring means as screws or screw anchors suitable for securing the block in a building structure so as to increase rigidity with respect to other mutually stacked blocks. 
     As an alternative to the use of the screw anchor 13, it is possible to associate an adhesive product or a double-sided adhesive tape underneath the bottom 10 of the frog 9. 
     The block 1 is also vertically associable with a wall or with an existing structure by using one or more anchoring brackets 15, which are preferably L-shaped and on the wings of which there are provided third holes 16 and fourth holes 17 at which first screws 18 and second screws 19 are placed; said first screws anchor the bracket to a wall or to an existing structure, and said second screws engage fifth holes 20 formed on the flat surface 4 laterally to the studs 6. 
     Advantageously, the body 2 defines lateral perimetric edges 22 between upper 21 and lower 11 perimetric edges thereof and one or more elements for connection to a framework 23, such as second and third engagement means comprising second seats 24 and third seats 25 preferably shaped so as to form a dovetail and a step respectively, are advantageously provided on the side of the hollow body 2, at one or more of the upper perimetric edges 21 and at the lateral perimetric edges 22. 
     Complementarily shaped legs 26 of the framework 23 can be inserted at the second seats 24, whereas the upper frame 27 of the framework 23 can be placed at the third seats 25. 
     Said framework 23 can have such an aesthetic configuration as to resemble the presence of the mortar gap usually present between two conventional bricks. 
     The shape of the legs 26 and of the framework 23 can furthermore be such as to allow the mutual connection, as shown in FIG. 4, of two mutually adjacent hollow bodies 2, thus constituting a further element for strengthening the block. 
     The configuration of the second seats 24 may naturally be the most appropriate according to the specific requirements. 
     If the elements for connection to the frameworks are not provided, the decorative resemblance of mortar can be silk-screen printed directly at the lateral surfaces 3 of each block 1. 
     Furthermore, at the lateral surface 3 it is possible to form a fourth seat 28 for accommodating boxes for the passage of electric systems, as shown in FIG. 8. 
     The cables constituting said electric systems can be passed inside the hollow body 2; guiding notches 29 for a hole, which can be made for example by means of a drill and is such as to allow the passage of the cables 30, are also advantageously formed at the lateral surfaces 3. 
     The mutual connection of various blocks allows to form 90° corners or other corners, as shown in FIG. 8. 
     Naturally, the shape of the block may be chosen according to specific requirements: thus, for example, FIG. 10 illustrates a block 1 having an inclined surface 31 which connects the flat surface 4 to the bottom 10, so as to obtain for example a roofing tile. 
     In another embodiment shown in FIG. 9, a fifth seat 32 is formed at the longitudinal median axis, starting from one end and for such a length as to allow at least one stud 6 to protrude beyond the flat surface 4; the block assumes a U-like shape having wings, and a plurality of smaller studs protruding from the wings. 
     A further embodiment is illustrated in FIG. 11, wherein the block is essentially shaped like a parallelepiped and constitutes a finishing component or resembles the shape of a tile or of a marble plate. 
     This embodiment is provided only with means suitable to allow the coupling of cables. 
     The number and arrangement of the studs 6 may naturally also be the most appropriate according to the specific requirements and thus, for example, said studs can be arranged along two rows which are parallel to each other or not. 
     Use of the block according to the present invention is immediate, since it is possible, as shown for example in FIGS. 5, 6 and 7, to build partitions or shelving or table legs, simply by mutually stacking, in the most appropriate manner, a plurality of blocks. By virtue of the temporary coupling means, the bonding means and the connecting elements, the blocks are considerably compact while having an aesthetic appearance which is very similar to that of traditional bricks, with reduced costs and assembly by unskilled personnel. 
     The invention is naturally susceptible to numerous modifications and variations, all of which are within the scope of the same inventive concept. 
     The materials and the dimensions which constitute the individual elements of the block may also naturally be the most pertinent according to the specific requirements.

Summary:
The building block has a hollow body with lateral surfaces which bear a decorative finish, a flat upper surface having studs protruding therefrom, and a bottom opening defining seats for accommodating the upwardly protruding studs of an underlying block. A frog is formed in the flat upper surface for permitting the introduction of an adhesive medium between adjacent blocks. The block can be provided with a framework having an upper frame and legs for interposition between adjacent blocks.