The capital and installation costs of building services in modern buildings can take up 50% of the total construction budget. For highly serviced buildings such as sports centres, this figure can easily exceed 75%. Services can also take up 15% of a building's volume. Therefore building services cannot be ignored. Architects have learnt to accept and accommodate the increased need for pipes, ducts and cabling encroaching on to their designs. Some with reluctance, not least Louis Kahn when writing in World Architecture in 1964: 'I do not like ducts. I do not like pipes. I hate them so thoroughly, I feel that they have to be given their place. If I just haled them and took no care, I think they would invade the building and completely destroy it.' Not all architects have chosen to compete with the ducting and mechanical plant. Some have followed the examples of Renzo Piano and Richard Rogers by integrating it with the construction and making it a feature of the building, viz. the Pompidou Centre in Paris and the Lloyds Building in London.